Np203 transfer case 2wd 2B. For NP203’s with a part time kit, the forward position is 2WD and the rearward position is 4WD. Ok, and BTW I wasnt knocking what you were doing. Save Share The 203 is an old ineffecient very heavy lump of transfer case that will take quite a beating, and doesn't offer the lowest of low ranges out there. New posts Latest activity. Once installed, the kit provides for low and high range operations in both 2WD and 4WD modes. All other cases I assumed were for 2WD only output unless you locked it and it would drive front an rear equally. 5" NP205-TH400 adapter: 4" NP205 assembled with yoke: 12. th350/np203 to th400/np205 SWAP HELP. After a part time kit is installed in the NP203, you'll come out with a 2wd low position as well as the 2wd high position. 4WLOC now becomes 4WD. Reply Subscribe . Blazer Soft Tops; Body Mount Kits; Body Lift Kits; Tube Doors; Body Bolt Kits; NP205 and NP203 shifters have absolutely nothing in common. With a part time conversion, you essential make the Hi and Lo positions '2WD Hi' and '2WD Lo', the Hi-Loc Transmission & Transfer Case . Are you sure you have an NP203? A stock system would have no 2WD position, so maybe you have a converted NP203? If its converted, have you made sure it is full of oil (it uses The NP203 Transfer Case shift pattern is 2WD-Hi-N-Lo-4WD Hi-4WD Low. Estimated Ship Date: Today. So my plan. NP205; NP241; Transfer Case Adapters; Body & Armor. Tim GM Chevy Dodge NP203 Transfer Case Rebuild Kit 1973-79 This is a rebuild kit for the GM/Chevy and Dodge New Process 203 full time transfer case for years 1973-79 This transfer case kit is for the chain driven transfer case only. Free ShippingLoading Estimated Ship Date: Monday 1/20/2025. The NP transfer case is a heavy duty gear driven transfer case in a cast iron case. Quantity. Dodge NP203 Transfer Case Torque Split Ratio. Originally before your 203 was modified the front axle would always drive in the unlocked position and the rear axle would drive though a differential gear set. Transmission. This adapter kit is designed for exclusive use with the 2WD GM 4L80E with a slip yoke out put Find Mile Marker Transfer Case Conversion Kits and get Free Shipping on Orders Over $109 at Summit Racing! Summit Racing SpeedCard - learn how to get 15% back up to $150 Manual Front Hub, Conversion, Chevy, Ford, GMC, with NP203 Transfer Case, Kit. I was going to take the cover off But, I left the stock NP203 Fulltime Transfer case in the '77, with the plan to buy the MileMarker Part-time Shaft to convert the T-case. The wheel with the least This 4x2 Conversion Kit converts a New Process 203 full-time transfer case to part-time operation. The pictures show the range of width capabilities of this assembly. 1/4" 304 stainless steel mounting point on the transfer case that is Put it in 2wd and drove down the 10 mile dirt road and then got on the highway. Input Gears; 4-to-1 (4:1) transfer case gearing in an NP205/203 package strong enough for big block power and full size trucks. The hubs are unlocked and it's in 2wd. The rearward position is “lock” which is used for low traction situations. You can find 'em in '78-79 F150's and 250's. If it's part time, one is hi-low, the other is The NP208 transfer case is similar to the NP203 and NP205 cases, sharing a number of applications between them, though on the 208 the casing is made out of aluminum rather than iron. So 2wd with the front still spinning resistance free. The front 2 sections are cast iron, the back 2 sections are typically aluminum. It has a differential behind the range box and a chain to the front output. I recently bought a 1978 F250 with a auto trans. The original Morse part number was HV-005. Loftis61. The kit includes a new TH400 to NP205 adapter, linkage rod, bracket, NP205 input gear with 32 internal spline, brake yoke, soft plug, bearing, snap ring, NP205 gasket, adapter seal, fastening hardware and The NP203 is identified by several features. 10W-30 motor oil is spec'ed for the 203 by the factory. First couple of thousand miles all worked just fine. There are some As my boy and I are rebuilding the A727 transmission on our 1975 W200 360/5. I have a '75 K10 with the NP203 transfer case. 125 ID fits NP 203 transfer case 1973 to 1979 K5, K10, K20, K30 Enter your email address and we'll send you a message when this item is available Please enter your email address in order to be notified when this item is available. 5 out of 5 stars No, the NP208 will for sure not bolt up to that NP203 adapter. 205 is part time, gear driven and a lot stronger. Sep 28, 2004 #6 4. The 203 is not my first choice but it was cheap. New posts Latest The NP205 gear driven transfer case is considered by many to be the king of bulletproof. You could use a divorced case like a NP205 or a Rockwell as a 2-speed unit but you would have to pick low or high before you got rolling. Its a 727 by a new name , with an adapter mating an iron case gear transfer case directly to it . If you measure from the casing to the center of the output shaft, it’s a 205. DrgHybrid Discussion starter. Long story short, I've got a 1978 k10 with an np-203 transfer case and a stretched out chain. This cast iron transfer case is made up of 4 housings. To change to any other transfer, you need to swap out, or totally tear apart the transmission, and change the tail shaft. or Best Offer. USA Made NP 203 transfer case chain! This chain has a 3/8 pitch with a 98-pitch length, and is available in 2" and 2. Joined Feb 17, 2011 · 111 Posts. Input Gears; Adapter Housings; Rebuild Kits; NP205 Parts. This full-time, cast iron case is made up of 4 housings. NP203 Transfer Case Data Sheet. Even with the shaft kit that allow the complete front wheel drive to be disengaged at the transfer case in 2wd (no power to drive shaft) bug allows the chain to slowly circulate for The LOC position actually locks the "center differential" (transfer case). An internal differential is used to split power between the front and rear axles in similar fashion to how an open 1973-1991 2wd-4wd conversion; Shackle Flip Kits; Leaf Spring Bushings. Buy It Now The NP 203 is an aluminum, chain driven, full time transfer case. However, the front driveline is still turning. L. When converted, the NP203 is not operating as it was designed. Great site. hole reconect and tighten your linkage remove the bit or nail from the hole and you should be good to go !! one arm is 2WD/4WD the other is high and low,and the shift pattern is all the way forward low loc,2low,netural,2 high,high loc pulling the shifter back 1 click at a time!! The NP203 chain drive transfer case was used in 1974 to 1979 model year Dodge/Ford pickups and 1973 to 1979 model year GMC/Chevrolet pickups. 4WD Loc / 2WD /N/ 2WD Lo / 4WD Lo Loc when front hubs locked and engaged. 96:1 (2WD) Lo range, a 2:1 (2WD or 4WD) Lo range, and a 3. They were originally a full time 4WD case, meaning all 4 tires receive power at all times. The lever further away from the driver controls the range box. 1 3 of 9 In a stuck open 2wd, if one tire has a traction limit of 5 ft-lbs, and the other tire has a traction limit if 1000 ft-lbs, 5 ft-lbs of torque will be applied to BOTH axle shafts. Typically this was a front wheel. 64 out of 5 stars. Reply Like #3 05 Transfer Case. The NorthWest FabWorks Adaptor kit allows you to mate the reduction box portion of a NP203 transfer case to the stout NP205. not a C10. You now have 2wd with zero output As the transfer case never gets hot in an engine sense, the oil will never ride the temperature curve to the second number viscosity. The nice thing about the 435/203 combo, is with practice you can double clutch the transfer from hi to lo, and back while moving. An NP205 can easily be twin-sticked due to the fact that each function is on a different rail and 2WD/4WD and Hi and Low Range can be selected independently once the transfer case has been properly modified. Thread starter FitzK25; Start date Jan 12, 2022; GM has been all over for fluid recommendations for transfer case lube but I'm guessing the thinner fluids and ATF were all for fuel mileage concerns. I The part time kit is basically just to replace the little "differential" in the transfer case to turn the 4WD position into 2WD with the hubs unlocked. Has a cast iron housing. $175. when the t-case is in either high or low, it is in 2wd; Which would be driven by the rear driveshaft. Bucky. I am wanting the AWD aspect of the NP203. It is found in 73 - 87's with manual transmissions. 00. The question I have is WHY? The NP203 is a fulltime, chain driven transfer case. Thread starter autumn walker; Start date Sep 21, 2012; Tags 2wd transfer case autumn walker Well-Known Member. I bought a 203 transfer case from a friend of a friend for $40. Sep 21, 2012 #1 Anyone know if this is possible? I have a line on a (free) 2WD/4WD transfer case out of a 2500 HD truck. Heres an old pic of my transfer case, Its for sure its a 203 because the tag says it. Or any other really abusive application you can come up with - Chevy, GM, Dodge, Ford or custom! The Doubler is an all gear, dual transfer case system uniquely suited to full size trucks or other heavy duty, high output/abusive applications because of the durability The NP203 full-time has been very popular for plow trucks and maintenance trucks because they maneuver better in the snow in AWD, and can switch to 4WD whenever needed. $110. S-10 2WD transmission options and conversion part numbers. ) After Converted NP203 grinding sound in 2WD. Drive it in reverse with the hubs locked in til you can shift her. Home; Find Your Transmission; Contact Us (727)868-9462; Shipping Info/Core Return; About Us; Warranty; My Account; Financing Available; Login; Register; Toggle navigation. Transmission This kit will adapt a TH400 2WD automatic to the GM NP205 transfer case and only be used when replacing a SM465 4 speed manual or a TH350 automatic transmission. The NP205 has four linear positions - 4H 2H N 4L. Registered Users; Posts: 107; FOLLOW ME,,,, ILL TRY IT. Assuming the transfer case is stock, the answer is no. NP203 based Converting a NP 203 Transfer Case. What is a transfer case? How does a transfer case worK? This video explains how transfer cases work. 10 gears, 7" lift The twin stick conversion allows you to operate the shift rails independently, so that you can operate the t-case in 2wd low The 203 is a very strong transfer case, Unless something is broken, or worn out, it is not worth the cost to swap it out. 1973 - 1979 F-100 & Larger F-Series Trucks - np 203 transfer case - My 1978 f-250 460 c-6 has a np 203 transfer case. Np203 Transfer Case Shift Pattern . 89. Free Shipping; $153. The NP205 is generally accepted and referred to as "bullet proof". NP203 cases use one style plate. S-10 Engine Swap General Info. The NP203 transfer case shift pattern sets the standard for how 4WD vehicles with solid axles will operate. Blazer Soft Tops; Body Mount Kits; Body Lift Kits; Tube Doors; Body Bolt Kits; Bumpers; Anyway, in L it would essentially be 2wd low range, but again the transfer case would send the power to whichever wheel had the least traction. my truck has manual locking hubs on the front, NP203 Case, but is still fulltime 4WD. It is known for its durability and reliability, making it a popular choice among off-road enthusiasts. If one end (front or rear) looses traction, all power tends to go to that end. The NP203 is a pretty good transfer case. Move the shifter down to the middle position and make sure you find neutral. Call our tech line for more info. It feels like it’s in that rear differential assembly. So I was looking around at the replacement transfer case from my donor truck. This transfer case is a good, strong box except for the chain. I wiggled the transfer case lever to make sure it was in the 2wd position. Or any other really abusive Swapping 2WD/4WD transfer case into H2. The shifter changes from high to low range, and locks the transfer the 205 is mated to a 3 speed automatic in my 1993 Dodge w350 from the factory . It's fine in 2wd ( converted case with locking hubs), only winter is coming up, and in 4wd with the hubs locked, the slack in the chain pops it back into 2wd intermittently. If you're using the axles off the 84, you'll need to get a different set of wheels from what you have now. Previously to adjusting anything shifting between neutral, and 2wd was fairly easy, shifting to 4low and loc required some effort, and shifting into 4high was a major pain in the a@@ (or wrist i guess. np-203 transfer case « on: March 21, 2010, 06:56:39 PM » hey guys. Transfer Case. QK2040 replaces worn or damaged OEM front output nut and washer. Jump to Latest 1991 GMC Sonoma 2WD Extended Cab w/ 4. C10 is 2wd. The fun is in building the parts to make the NP203 a Divorced Transfer Case, custom Intermediate Shaft, Custom Mounts (i'd add a super beefy Crossmember under the NP203 TRANSFER CASE DETAIL IDENTIFICATION: The New Process 203 is a chain-driven transfer case. 96:1 low ratio. The transfer case lock indicator light switch is located on the shifter linkage bracket and may have worked itself loose from its mounting hole over time. You can find a NP435 from '75 I think until '87 in the F150's and '75-79 (maybe a little later) in the F250/350. This one is a 360 gas small block . Sorry about the unclear transfer case explanation. If a part-time kit is installed, the case must be run in 4WD mode (HI or LO LOC) every 100 miles or so for proper lubrication. Thread starter devin bianco; Start date Nov 18, 2020; Tags driveshafts help linkage np203 np205 np208 swap t-case th350 transfer case Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Jump to Latest 41 - 60 of 175 Posts. Best all around case. 232" . In the last couple of months it’s developed a nasty metallic buzz/grinding sound in 2wd high. Billet Aluminum Housing with Heavy Duty 2” roller bearing. NP203 Transfer Case Fixing Up a Heavy Favorite There was more to For those not familiar with the NP 203: It is an all wheel drive transfer case for full size pickup trucks. th350/np203 to th400/np205 SWAP HELP . The gear ratio choices are as follows: 1:1, 2:1, and 4:1 Please Use the Drop Due to High Sales Volume and Limited Material Supply all 203 to 205 Dual Transfer Case Adapters are made to order. Buy Mile Marker 501 Hubs Conversion Service Kit fits NP203 Transfer Case - Full Time 4WD Vehicles - Reduces Wear & Tear - Improved Fuel Economy - Exceptional Performance & Reliability: Transfer Case Components An Np203 transfer case is a type of transfer case commonly found in four-wheel drive vehicles. It was used in various four-wheel drive trucks, including the Dodge Ramcharger, Ford F The NP203 transfer case shifter simply has three positions - H N L - selected by a rotating shaft. Messages 707 Location Nova Scotia, Canada. the Average Fulfillment is 8-10 Weeks Our Dual Transfer Case Adapter Kit was designed to mate the NP205 Transfer Case to the NP203 Range Box. Converted NP203 grinding sound in 2WD. Part Number: MMK-502. Bellhousing Adapter Kits. Transfer Case . Jump to Latest 21 - 39 of 39 Posts. 25 rear with Detroit Locker, 4. The gear reduction box from a GM NP203 transfer case plugged on using factory parts. $275. 2L diesel, TH400 and NP208 from 1984 CUCV Blazer into the truck and later added a Banks turbo kit with the Banks exhaust. To convert to a married NP205 you'll need to get an The NP205 can be converted to twinstick so you can easily use 2wd low for instance. 49" thick, which pilots perfectly on the NP203 input shaft seal carrier. np205 with racetrack adapter/dana20/stock 2wd output/boltyoke output : 4. Jump to Latest Previously to adjusting anything shifting between neutral, and 2wd was fairly easy, shifting to 4low and loc required some effort, and shifting into 4high was a major pain in the a@@ (or wrist i guess. To answer your question, my original owners manual says you are allowed to shift from HI to HI LOC while moving as well The Pcm use the VSS in trans (2wd) or transfer case (4wd) to read driveline speed compared to engine RPM driven off the Crank sensor to shift the transmission regrad less of transfer case gear since even in 4low the VSS gives what the gearing is actually so the PCM nows whats going on! But your confusing engine Rpm with driveline speed! 1973-1991 2wd-4wd conversion; Shackle Flip Kits; Leaf Spring Bushings. Hey, I have been searching and I am kinda stuck on which transfer case to use, just wanted some input on which one would be better or worse. It was supplied in many GM My F250 I've driven for 25 years is a divorced application and when i did my swap I left the T case in the factory location but added a 203 range box to the front of the T case and used a 2WD trans with the factory slip yoke tail housing the drive line ended up only ~6" long and has been working well. They feature a shorter overall length to allow the use of the existing transfer case. It's due to the fact that the upper part of the 203 case is lubricated by the Manual Front Hub, Conversion, Chevy, Ford, GMC, with NP203 Transfer Case, Kit. Neutral is self explanatory. The transfer case is made up of 4 sections bolted together, a range box, the chain case which houses the chain drive to the front driveshaft output, the differential housing, and the output housing. Mount the T-case backwards and you're good to go. The only thing you will gain by going to a twin stick 203, is 2wd low range Where do you get a new chain for a np203 Forums. By studying the diagram, they can gain a better understanding of how different The NP203 tcase is a full time transfer case that sort of splits power between axles when in the 2hi position. You could do as some are and take the low range unit from the NP203 and mate it to an NP205 to get a deeper low range. They burn up the torrington thrust bearing and it starts skipping out of 4WD. The only way to get 2WD out of that truck would be to either swap in the expensive conversion kit, or to shift it to I have an unconverted NP203, but couldn’t tell you how much it affects gas mileage. Ourput shaft length is probably an issue too. If your transfer case is making a popping noise when engaged, the chain could be stretched and jumping teeth. Newer 241s dont have provisions for the old style speedo outputs. How to use with Magnum underdrive system: Use new TH400/Ford NP205 adapter from ORD or rare Make sure you pick a transfer case that can provide the correct output for your speedometer. Can be adapted to operate in part time operation NP 208 transfer case dana 44 front (part time) and 9. 5 inch stickout Also the np203 most likely has the wrong input shaft. 2wd trannies have the speedo output at the back of the trans. ZTNPMIM501. The NP205 originally coupled to a TH350 has a male 27 spline -1999 Vortec 5. The truck is in pretty good shape, fairly rust-free with a 4inch lift, excellent 35 mud Author Topic: Full time 4x4,want 2wd (Read 31837 times) codyC10kid. If this is the case, there's two different functions depending on if it's still a full-time 4x4 case or if it's also been converted to part time. 88s, 5" lift, M12000, 1973-1991 2wd-4wd conversion; Shackle Flip Kits; Leaf Spring Bushings. BTW: A trick with the NP203 with part-time kit installed. Front Leaf Spring Bushings; Rear Leaf Spring Bushings; Complete Front and Rear Bushing Kit; Basically, the Doubler consists of the gearbox section from an NP203 transfer case coupled to a complete 205 transfer case. You have to work at it to kill a 203. I belive it has a 1. Input Gears; 4-to-1 (4:1) transfer case Dual (doubler) Transfer Case Adapter Kit was designed to mate the NP205 Transfer Case to the NP203 Range Box. The Np203 transfer case consists of several important components that work together to transfer power from the transmission to the front and rear Transfer Case. Add to Original drivetrain: Chevrolet 400 V8 small block, TH350 and NP203 transfer case Installed 6. 5" widths. Sample ORD Doubler 4:1 Dual Transfer Case, NP205-NP203 - Fullsize 4x4 Parts - if i'm not mistaken the NP203 rangebox is on the right going to your transmission, whereas the NP205 transfer case (with it's own built in rangebox) is on the left. If you run a converted NP203 in 4wd or a stock case in LOC on pavement the transfer case will bind up. Add to Compare. Opens in a new window or tab. DrgHybrid · Registered. 1 2. Last time I had it in 4hi, it had a hard time getting back into 2hi. i can do just about anything to 2wd vehicles so i can understand any info u give me. 2269 posts · Joined 2009 Add to quote; Only show this user Converted NP203 grinding sound in 2WD. When I bought the truck it already had a conversion kit in the transfer case. This kit includes all main roller bearings, seals, gaskets and complete small parts kit with needles, snap rings, and washers. so when you took out the front drive shaft, all of the power is being sent to the front end. I shifted into reverse, then when it started rolling, I hit neutral and got out of 4wd. 2A. The adapter kit includes a adapter housing, NP205 input gear with 32 internal spline, soft plug, new input bearing, snap ring, seal, gaskets, fastening hardware and adapter instructions. my buddy had a k5 blazer with the NP-203 T-case, and it vibrated bad, replaced both I have had a 1992 350TPI with a 2wd 700R4 sitting in the garage for years so thought this would be a great time to do the swap. Sent from my iPad using Tapatalk The truck had been sitting for a while when I got it so I changed all the fluids, including the transfer case, with straight 30w. The truck is a 91 k1500 ext cab short box. One way to tell them Transfer Case. Engine to Transmission; Transmission to Transfer Case; Flexplates; Locking hubs were never an option with the NP203 because it was full-time 4WD. I have seen your pictures & think you have an excellant project. 9, I was thinking about the possibility of changing out the transfer case to The np203 transfer case shifter diagram can also be helpful for owners who want to make modifications or upgrades to their vehicle’s transfer case system. What I want to do is that minus the rear transfer case really. Jump to Latest 15K views 38 replies 14 participants last post by kingcrunch Sep 6, 2011. There are The full-time four-wheel-drive NP203 transfer case is one of the most standard items found in 70s fullsize 4x4s. The differential in the transfer case allows it to drive all four wheels on a hard surface without binding. 4xfan78 New member. The 4 transfer cases availalbe in Squarebodies from 73-91 were NP203, NP205, NP208 and NP241C. I recently broke the back off of my 208 transfer case. **Notes** -NP203 must have the same spline count as the Transmission it is bolting . 4wd setups have the speedo output at the transfer case. Benefits include reduced front driveline wear, better gas mileage, improved on-road driveability and decreased turning radius. Most don't realize that 80-90 gear oil is equal to straight 30 weight motor oil and 140 equals straight After working through two complete transfer case builds (an NP205 and an NP203), replacing nearly every shaft in both boxes, and pestering Watson with plenty of tech calls, it became clear that in 1973 - 1979 F-100 & Larger F-Series Trucks - NP203 to 2wd - I have a 1977 f150 4x4 with the NP203 full time 4wd. The first number is the effective viscosity for the transfer case application. NP205, 208 and 241 use the other. Reactions: Craig Nedrow. But someone may have swapped in a short input to mate up with a more The 203 transfer case shifter has five positions. There is a differential in the transfer case that allows it to stay in AWD all the time. The An 86 K10 would have been a 700R4/208 combo most likely, so you would get a better part time transfer case AND an overdrive gear. NP203 Range Boxes; SCS Transfer Case; NP203 Parts. All are passenger side drops, and all are manufactured by New Forums. It has a mild rebuilt 350, I will have two trans options, right now I have a strong working stock th400/np241 in it but I have a built 2wd th400 that could be used as either to convert it to GM 4L80E 2WD to GM NP205 transfer case,adapter kit. I was wondering that if it is a full time transfer case, should i just keep the front hubs locked at all times or what? It could be deeper into the T-case. 75 OD - 2. (replacing TH350 or SM465) Close. I know what my options are as far as swapping case, eBay for used 1973-1991 2wd-4wd conversion; Shackle Flip Kits; Leaf Spring Bushings. Thread starter FitzK25; Start date Jan 12, 2022; Transmission & Transfer Case . This chain is a crucial component in the operation of your four-wheel drive system, and its reliable performance is essential for smooth and efficient power transfer between the transmission and the drivetrain. The NP203 is the only "odd" transfer case use in production that doesn't directly swap with the exception of the few odd NP205s in some diesel applications. Or any other really abusive The differential in the transfer case has been"disconnected" so it will not drive the front axle. The NP203 wasn't designed to be ran 2wd. The gear ratio choices are 1973 - 1979 F-100 & Larger F-Series Trucks - NP203 Transfer Case Questions - I am interested in finding a non-divorced Ford NP203 to mount behind a NV4500 transmission. 4. The NP203 Transfer case. $32. From NP203 Transfer Case Linkage. K10 is 4wd. It has the ability to be made part time to give 2wd. mike975 (486) 100%. NP203 to NP208 swap? Thread starter iamtherealJayy; Start date Jan 4, 2023; Tags np203 L. The adapter material is 356 T-6 heat treated aluminum alloy and the adapter has a provision for a transmission. 92:1 (4WD) double-low range. when talking about a np 203 "full time 4 wheel drive" means that power from the engine is sent to wheel that has the least traction. This allows a 3 speed Transfer Case. Its biggest downfall is that the transfer case came from the factory as a full time unit. Big, heavy, and relatively strong despite its chaindrive, this box can be NP-203 TRANSFER CASE: The New Process 203 was used in GM, Ford, and Dodge through the 70's behind auto and manual transmissions. So the dual shifter thing makes sense, it probably wasnt ever converted to a part time transfer case but with the dual stick design it acts exactly like a part time case. I think that it is a np 203 (chain drive) what is the np gear drive? Sep 28, 2004 #7 shift it in 2wd with hubs unlocked and get under the truck and see if you can turn NP203 full time chain driven t-case. You see, when the t-case is in either high or low "lock" it is in 4wd;enabling the vehicle to move without the rear driveshaft. Free shipping. Please make a selection for each of the required (*) options above before adding item to cart. Front Leaf Spring Bushings; Rear Leaf Spring Bushings; Complete Front and Rear Bushing Kit; GM/Chevy NP203 Transfer Case Rebuild Kit . Then all was quiet and "normal". . For the most part the truck is original. I have a 74 f100 with full time t case but no unlockable hubs. Thread starter FitzK25; Start date Jan 12, 2022; My only update is I pulled the rear driveshaft yesterday, and while the output shaft bearing feels tight in the transfer case, there is a ton of rotational slop. If this is the case then you either have A) a part time transfer case, or B) you have a NP203 that has already been converted. Front Leaf Spring Bushings; NP203/NP205 Doubler Adapters and Shafts Only; Complete Transfer Case Assemblies. Np203 case . Pictures would help figure out what transfer case you have. If it's full time, one shifter is for hi-low, the other is for lock-open (I think). Reman transfer case parts are made to order and require a separate checkout from other items. Problem arise, as so many people prefer a part time transfer case. This gives you an additional low range gear of 2:1 plus NP-203 TRANSFER CASE: The New Process 203 was used in GM, Ford, and Dodge through the 70's behind auto and manual transmissions. NP203 and NP205 transfer cases commonly came behind TH350 transmissions, but they never came behind 700R4's. The Loc positions, both Hi and Lo, lock the speeds of the driveshafts together by locking the differential within the case. Free Shipping; Mile Marker Part-Time Transfer Case Conversions 501. And I got a d44 cheap that has locking hubs. YY NP205-141032 Yukon 1410 series bolt on transfer case yoke fits NP203, 205, 208, 241 with 32 spline output Pictured it is on a 1978 F250 2wd. and a NP203 transfer case. Log in Register. Most are married, with the exception to a few divorced found in Ford applications. Running the truck in 2wd with the t-case in HI-Lock is not good for it in the long run and you will not I’ve got an np203 mated to a th350. Thread starter FitzK25; Start date Jan 12, 2022; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. Web86 rows NP New Process Transfer Case Diagram. Members. Stainless steel pivot pin with stainless nuts/washers. The 203 was supposed to be a full time 4wd transfer case. 1973 - 1979 F-100 & Larger F-Series Trucks - 1978 F250 NP203 Transfer Case - I was hoping some one can enlignten on the NP203. In this position you can put the truck in Do you need to have the hubs locked in to move when in high? If the answer is yes, your transfer case has not been modified and it will not be true 2WD. Transfer Case Adapter Kits. so the front and rear output will always turn at the same rate, provided that the case is engaged in 4wd. The transfer case is leaking a good bit from the front. The Ford version is a part time, cast iron and offers a 31 spline female input gear, circular six front bolt pattern and a drivers side front out put shaft. While reading about these transfer cases I saw that for Ford models there are different width chains Converting a NP 203 Transfer Case. The shift lever on the transfer case was leaning at an angle, I had some serious drivetrain bind. If the GM NP205 is equipped with a 32 spline female input, the new 32 spline input that is included in the kit will not be needed. 1973-1991 2wd-4wd conversion; Shackle Flip Kits; Leaf Spring Bushings. The adapter assembly fits 1971-84 GM NP205 with a figure 8 front bolt pattern, and is designed to replace the 10 or 27 spline male inputs. ) After adjusting the linkage it shifts pretty easy from 4lo-neutral-2wd, but it doesn NP203 Transfer Case for Ford 77-79 F-Series And Bronco Only. 99 Transfer case ID Photos . Manufactured Transfer Case Rebuild Kit, Bearing Kit, New Process 203, GM/Dodge, Kit. Clemons 1988 Ramcharger AW450-318EFI-NP435 4 speed-NP205 Transfer Case 4l80e and NP203. I have NP203 becomes 2WD Loc / 2WD /N/ 2WD Lo / 2WD lo lock if front hubs unlocked. 7 motor and trans out of 2wd GMC 3500 dually (and all computer junk and wiring) what I have on hand, and taking cost and parts availability, Option 6 (5. 97 FZJ80, 3xlocked, 37" Cooper STT Pros , 4. do 1 to 4 in lo, drop the maijn back to 3rd, and transfer to hi, then to 4. I would prefer running something like 20W50 for transfer case. Adapters. USA Standard Transfer Case NP203 Part-Time Conversion Kit. Hi is High range, Low is low range. Then you put it in lock, and it locks the diff in the t case and puts equal power to front and rear shafts, forcing both axles to have drive, equally. The NP203 transfer case is a part-time, chain-driven transfer case manufactured by New Process Gear from the late 1960s to the early 1980s. In this configuration the operates like more conventional transfer cases in that its either in 2wd or 4wd and when in 4wd the power is evenly split from front to rear. The NP435 in an F-100 with a Dana 21 transfer case is a 2WD unit. It was. Probably 10 miles down the highway while cruising at 60 mph there was a sudden bang/clunk noise and I saw my transfer case level jump. The differential within the NP203 is essentially an open differential and works just like a rear axle with an open differential does. The NP203 is identified by several features: 1. Thread starter kevin lefebvre; Start date Feb 22, 2022; Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. There is straight drive through, 1:1 in high gear and low gear is 2:1. NP-203 TRANSFER CASE: The New Process 203 was used in GM, Ford, and Dodge through the 70's behind auto and manual transmissions. 5" NP205 assembled with slip yoke housing: 14. With an open diff 2wd, you are not driving around in one-wheel drive all of the time. What's new. What's new Search. More specifically, the video will explain how a transfer S2125-2 Rear output Seal 2. This assembly was used in 1971-79 vehicles. And I forgot to mention. -32 Spline NP203's came off of TH400 Transmissions from 1975-1979 this transfer case can be mated to 4wd GM NV4500, 4WD TH400 with stock NP208 Mounting Adapter, 4wd SM465 1985-1990 with NP208 Adapter, 4wd GM 4L80E with Stock NP241 Adapter Sounds like someone has done a 'twin stick' modification to it. Save Share Reply Quote Like. I have had no luck with the 203 case and part time kits. The Guts. Drivetrain Conversion Packages. Last Does yours have an aluminum spacer between the trans and t-case adapter? If so, it's probably a short tail 2wd th350. D. Registered Users; The NP203 is not a bad transfer case, it's really heavy duty and as a full time transfer case it will perform very well. As to the hub question. Add to Cart. however i just got my first 4 wheel drive. the part-time kit makes the NP203 a little less reliable because Hey guys. Sponsored. I had some confusion lately with my 203 t-case. 7L The reason I have this combo is I am doing a 4wd swap in my 2wd. Jan 4, 2023 NP203 transfer case availability and rebuild Clutch, Transmission, Differential, Axle & Transfer Case; NP203 twin stick NP203 twin stick. It is weaker than the "bullet proof" NP 205. Easily Converts a 4wd transmission into a 2wd to make running a divorced transfer case easier then ever. While in neutral, engaging either low range Curious as to the 4L80e output shaft length used, and the thickness of your adapter? I have a OE 4L80 adapter (6 bolt at trans, 6 bolt at t/case) that is 2. This adapter assembly fits the Ford NP205 part time transfer case. Search Transmission & Transfer Case. New posts Search forums. Pre-Owned. Joined Mar 14, 2002 Messages 6,911 Points 113 This is the most common TH400 output shaft and came in most 2WD TH400’s as well as ’84 and older TH400/NP205 systems. 1973 - 1979 F-100 & Larger F-Series Trucks - NP203 with Locking hubs and unconverted Transfer case - Hello all, I recently picked up a really nice 1978 Bronco from Colorado (i'm in Ohio) with the Full time 4 Wheel Drive NP203, hooked up to an Auto trans. Used by Dodge 1974-1979, Ford from 1974-1979, and Chevrolet and GMC from 1973 to 1979. And I got a 360/np4530/np203 with a pto on tranny and on t-case. Even if a tire does not turn, it receives the same torque load as the 1973-1991 2wd-4wd conversion; Shackle Flip Kits; Leaf Spring Bushings. 7/TH400 and a NP203, NP205, MP 208 and NP241C transfer case) is what I want to go with. you'll need to use the adapter plate that goes between the trans and t/case from the 84. Logged 1973 GMC So if you get stuck, it is possible for just one wheel to spin. In this configuration the 203 operates like more conventional transfer cases in that it's either in 2wd or 4wd and when in 4wd the power is evenly split from front to rear. The NP 205 is all cast iron, gear driven, part time t-case. Thread Tools Search this Thread #1 Can you make your own? It is not that hard to do. The transfer case is made up of 4 sections bolted together, a range box (the gear reduction we use for the Doubler kit), the chain case which In this configuration the 203 operates like more conventional transfer cases in that it's There is no 2WD function in a stock NP203 transfer case. 32 Spline 203 Input Gear . The NP203 shifter does not use shift rails like the NP205. 205 case thickness: 6" NP205-TH350 adapter: 3. In researching my options I looked at many trans/T-case options. Darrel Lives in an IH Dealership. These units are made for BJ's Off-Road and are The problem is, the KM145D (5-Speed Overdrive) transmission is shifted through the transfer case (and finding a 2wd KM145D wouldnt be worth the time/money/hassle). One lever is for 2wd to 4wd engagement, and the other is high and low. Estimated Ship Date: Monday 1/20/2025. What the heck? If the conversion kit maintains power to the front driveline in 2wd what's the point of even having the kit? For stock NP203’s, the forward position is “unlock” which is used for street driving. Input Gears; Transfer Case Adapters; Body & Armor. Np203 Transfer Case Diagram. The NP203 is a 4wd all the time. Add to Wish List. After doing some research and talking to a t-case guru I think I have sorted it out. Usage: Chevy Blazer, Suburban, and Tahoe The new Offroad Design Magnum Box is our super compact 4 speed transfer case system featuring our "fat shaft" technology that truly equips you to use any of the available ranges without fear of breaking the intermediate shaft. Fits 23 Spline 4wd 727 Transmissions that came factory with NP203,Np205,Np241 transfer NP 203 Transfer Case Shifting Problems. General info 2WD & 4WD. Most transfer case ratios are 2:1 By converting the NP203 to part time 4WD, the front axle is now disconnected from the transfer case, but if it still has the stock hubs with no way to free the wheels, you are still rotating all the same components as if it was still full time 4WD. Last edited by a moderator: Sep 27, 2004. The shift pattern involves four positions, two low ranges, a neutral, and one high range. its a 79 k-10. Leaving the hubs turned, especially when going in and out of mud and water, does cause more wear on the spindle bearings, but being able to shift on the fly when bad stuff hits is worth it. Henceforth not enabling the vehicle to move with The New Process NP203 is a large cast iron transfer case, weight in around 170 pounds. It is a chain-driven case with a front housing using helical cut gears offer a 2 to 1 gear ratio. Brand New. Jump to Latest i don't want the 203 anyways so i'm trying to put a 205 in cause i want 2wd and manual hubs . That is when the high loc or low loc comes in handy. 3 in stock $120. Instead it uses a QK2040 NP203 and GM NP205 Transfer Case Front Output Nut and Washer Set for GM NP205 Part Time Transfer Cases AND GM, Dodge, or early Ford NP203 Full Time Transfer Cases. Clemons 1988 Ramcharger AW450-318EFI-NP435 4 speed-NP205 Transfer Case-Dana 60s-Braden Wormdrive Front Winch 2018 Ram 2500HD Crew Cab 4WD 5. Discussion starter · #21 · Aug 29, 2011 Shift pattern is 2WD 4-HI N 4-LO Some AWD cases can work without a front shaft, interesting the 203s can't except in loc. this is normal 203 operation. NP205 was a gear-driven transfer case, while the NP203 and 208 were chain driven. If the transfer case locked the front and rear axles together then it would fight you when turning sharp as the front and rear drivelines need to turn at different speeds. 32 The 4L80E adapter to the Ford NP205 transfer case is a 4. 78 Gmc, np-203 transfer case problem. The better setup is the 435/205. 875" NP203 Transfer Case Torque Split Ratio. now processes this information and sends info to a rotational servo motor that applies a multi-disc clutch within the transfer case and can distribute torque from front to rear driveshafts from 0% to 100% in 4-to-1 (4:1) transfer case gearing in an NP205/203 package strong enough for big block power and full size trucks. It may make nasty noises when she finally condescends to shift but I doubt you really hurt it. To convert to a married NP205 you'll need to get an 1973 - 1979 F-100 & Larger F-Series Trucks - Transfer case popping into nuetral, Np203, help! - Here's the situation: A friend of mine recently got a '77 F150 on a trade for a junky 2wd small-block powered S-10 (excellent trade). The low range of both is cases is around 2:1. My own adapter, which made the backside of the NP203 "look" like a TH-350 also, allowed a GM NP205 transfer case to plug right on! The combination offers 1. effectively Giving you 6 forward gears. New Process 203 NP203 Transfer Case Small Parts Kit TC203-50. If you click them and make a purchase, we may earn a small commission. they will run the big bolt pattern unlike your 75. I’m using full synthetic in the transfer case, but most of the drag is probably coming from the If the vehicle doesn't move, the kit is working correctly. The transfer case has a two speed gearbox at the front much like a non-synchro manual transmission rather than the planetary set found in most transfer cases. Some thought and fabrication will likely be Lockouts were never used with an unconverted NP203. Registered members Current visitors. KNowing what engine and transmission, and what rig you have might help figure out the shifting problems. The kit seems to be working correctly (t-case in what WAS 4hi with hubs unlocked, moves truck just fine). My question is if I just do that and have it in 4 hi (not locked) will it move? NP203 Transfer Case Just didn't want to pull the transfer case. The transfer case is married to a 350 transmission that is not factory listed, it lists a 400 transmission. S Np203 to Np205 , transfer case swap. The NP208 transfer case that was on the CUCV bolted up to the 4L80E without a problem, having the correct amount of teeth on The Morse NP203 73-80 2-inch Transfer Case Chain HV009 is a high-quality replacement part designed specifically for Morse NP203 transfer cases. The NP205 might be OK on the output shaft length but I'm not 100% certain on that, but the NP205 has 2 adapter options, 1 being the race track pattern and one being the newer round pattern that is a bit more rare in era of trucks so you'll likely find it on a later Keep in mind the NP203 transfer case was designed before the first fuel shortage and gasoline was less than 40 cents a gallon. I planned to -NP203 T-cases with the "lock" switch only have 7 bolts holding the tailhousing to the t-case! NP203 t-cases without the switch have 8. 2. 3 TBI. Â Â My questions is: You can run in 2wd by unlocking the hubs and shifting the t-case into HI-LOCK. Author Topic: np-203 transfer case (Read 3157 times) BIG CHEVY. Hi, Hi Loc, Neutral, Low, and Lo Loc. I would like to put some warn manual hubs up front to make it 2wd. Input Gears; Transfer Case Adapters; New Process NP 203 Transfer case Skid Plate Chevy Truck 73-87-91 Square Body 4x4. Drill/tap six bolt transfer case pattern into face of NP203, plug up stock holes and make a tab to hold down the idler shaft. So from what I have heard The NP203 has a 22’, and the NP 208 is around 18”). 111 posts · Joined 2011 Add to quote; Only show this user #1 · Aug 27, 2011. The NP203 originally coupled to a TH350 has a female 27 spline input. Only two gear ratios. Part Number: SPZ-76163 2. But there is no option for a different transfer case.

Np203 transfer case 2wd. DrgHybrid · Registered.