Th400 Output Shaft Swap

I need to swap the innards from a recently rebuilt short shaft (4x4) th400 with a damaged case into a Monte Carlo 400 case. What would you do to improve our website? We're always looking for ways to improve JEGS. Have a 32-spline input NP203 Have a TH400 need a 32-spline output shaft + adapter from a TH400/NP203 combo for a future doubler will take a complete tranny core to get the shaft and adapter if necessary. Find Transfer In Stock Now. The drive shaft angle is exagerated in these drawings. we have a 93 f350 ford c6 4wd trans and want run it only as a two wd what parts do we need, like output shaft and tailhousing. The 4L80 is similar to the TH400. The 4L80E transmission is the advanced progeny of the legendary TurboHydramatic TH400 automatic transmission, and is based heavily on the 400 in both parts and strength, yet featuring an added overdrive gear, a lock-up torque converter and advanced electronic controls. Nowadays, there are a lot more options than a Powerglide, TH350, or TH400 transmission. The factory Jeep TH400/D20 combo has a unique spline and length on the output shaft of the transmission where is mates to the D20. drums which reduce the rotating mass. Behemoth drivetrain makes a shaft so it would work, you need a lot of pieces from another case (which I have). All gears are stamped with 300-X-X. Otherwise both units are similar internally and should be fine with a proper cooler. However, you will need to measure your car from the end of the output shaft the center line of the u-joint cap on the diff and speak with driveshaft shop to make sure you have the right length. That's what I did when I put a th400 in mine, Blend an Olds case with the output shaft from a (you guessed it) Bitchn' Camero :-). 1985-1991 TH400 to 6 Bolt Round NP205 will Require a 4wd 4L80E or a 2wd 4L80E with a 4wd Output Shaft. LOL) Just swap out the driveshaft yoke and you'll be good to go. The one exception is the TH375, not to be confused with the TH375B, which features TH400 internals with a TH350-sized 27-spline output shaft. GM CHEVY TH400 TH375 14 3/4" LONG OUTPUT SHAFT & OVERDRIVE EXTENSION GEAR VENDOR Transmission Adapter Spacer TH350 TH400 Conversion Swap LS2 LS3 LS6 5. My 2 cents. What would you do to improve our website? We're always looking for ways to improve JEGS. This version also has a 30 spline input shaft and the same 27 spline output shaft as the Powerglide. What everyone does agree on is the TH350 is shorter and doesn't use up as much horse power. When we got this truck we didn't know what was wrong with it, only that it would not move. AMC TH400 to Dana 300 Hi to all, And the advanced adapter one come with the needed output shaft and new output bearing to do the swap. They are intended to eliminate the hassle of having to swap driveshafts when swapping between a Powerglide and a TH400 transmission by locating the drive shaft. All you need to install it is a pump gasket and seal. 90-91's have no speedometer cable, and retrofitting one is a waste of time, as you'd have to change the cluster, etc. The latter is the one that came with the switch pitch torque converter. Bolt on LS1 swap kit for your BMW E36. A longer 4x4 output shaft was used for around 1. Th350 swap to th400 (self. Stage" and Lock-up Packages available at an additional price. This is because it is the longest shaft they make in them, and the only one that can work for this convesion. Then bolt on the shorter tail housing. Damn it's nasty. Took the car out yesterday for the first time since the swap. I assume that so long as you get the output shaft and matching tailhousing from a 2WD TH400, these parts will swap into your case with no problems. Our Kit includes an 8620 Billet mainshaft to connect your NP203 to the NP205. This conversion is often described as a "straight forward" swap, the well known adjustments concern shortening the driveshaft, changing the connection to the shift lever (and speedo lens) and building the lockup. TUB01 900H Filler Tube & Dip Stick, GM Universal Fitz All (Teckpak) 64-98 1 TH400. However, you will need to measure your car from the end of the output shaft the center line of the u-joint cap on the diff and speak with driveshaft shop to make sure you have the right length. When we got this truck we didn't know what was wrong with it, only that it would not move. If you get the 2WD version you will have to pay a couple extra bucks for the right output shaft. For the Turbo 400, I got the full right valve body, manual shifting, and buying a local core AND throw in a new output shaft…and upgraded internals with a new torque converter for < $1000… and I can sell the 4L80E (hello Craigslist!) to boot. GM still sells the correct yoke, part number 14075214. is the distance from the rear edge of the tailshaft to the rear edge of the output. I was given a new TH400 that was mated to a NP 218. :help!: I have a TH400 like the one pictured that has a fixed yoke rather than a slip yoke. This was because the nail head TH400 does not bolt to any AMC motor. (No Output Shaft Modifications are Necessary) All 2wd and some 4wd 4L80E have VSS Sensors built into the transmission. TH400 / Turbo 400 Aluminum Forward Drum & Input Shaft. we have a 93 f350 ford c6 4wd trans and want run it only as a two wd what parts do we need, like output shaft and tailhousing. 00 Add to cart; TH400 4WD short output shaft, 5 1/2″ measured from the hub $ 149. 04-30-04 07:40 AM - Post# 436644 In response to TravisA I am pretty sure all the 700r4 output shafts are the same size with 26/27 teeth and 1 1/2" outside diameter. If you put a 40 tooth reluctor on the output shaft and run the corresponding pickup from an 80s/90s TPI car or TBI truck it should send the correct VSS signal to the PCM. TH400 aren't as good as there bragged up to be. The factory Jeep TH400/D20 combo has a unique spline and length on the output shaft of the transmission where is mates to the D20. I haven't heard of anyone trying it though. Although the Superlite is based on a GM TH400 transmission, its very low parasitic losses make it a natural for the small block Ford Mustangs. PATC builds GM performance transmissions in many levels. I was running dex3h because I read online a few people had problems running dex6 and reverting back to dex3 solved them. 0-liter V8 swap. With a 1800 stall converter, the actual flash speed would be 1200, so 3600 rpm on the output shaft of the engine would mean 2400 rpm (3600-1200) after the converter. 90-91's have no speedometer cable, and retrofitting one is a waste of time, as you'd have to change the cluster, etc. One of the similarities between these transmissions is that both of them are electronically controlled. The output shaft of the TH400 was a long coarse 10 spline shaft that was unique to this application. I know I will have to change the slip yoke to a 27 spline output but do I have to change my drive shaft and/or crossmember?. When we got this truck we didn't know what was wrong with it, only that it would not move. TH400 shifting problems. The good news is that they have the same output shaft and mounts to connect transmission to transfer case. I don't think so, we would have to have the overall length of the TH400 with the adapter to be the same as the 700R4 with the adapter. GM still sells the correct yoke, part number 14075214. This design will replace the truck style bolt on yoke with a car style slip yoke and allow for proper slip travel and bushing contact for best performance. 5R55S to TH400 swap (05-09 auto GT) It installs where the cable driven speedo gear goes on the output shaft. Factory shaft for TH400/NP208 combination. I'm doing a th350 to th400 swap in a third gen Chevy Nova, i know about the cross member being moved back and the larger output yoke but my question is will my drive shaft need shortening? I'm thinking no considering the th400 was an option in these cars, if anyone has experience with this thanks. In many cases, the transmission you’re swapping in for a TH350 or TH400 will have a longer tailshaft than the OE unit thus requiring the services of a competent driveshaft shop to shorten (and rebalance) it the appropriate (3 inches or less) amount. This page is all about what I learned after I decided to swap the original TH400 transmission in my 1975 GMC Suburban for a TH700R4 transmission to gain the benefits of a modern overdrive transmission and help tame my "great for towing" 4. I have a 95 Tahoe and want to use a TH400 for a tranny in my swap. There is also two 4WD output shaft lengths, the shortest and more common is seen below. If you the OP are going to swap tailshafts to convert you might as well rebuild the complete tranny while you have it apart. On the tailhousing "375-THM" is typically cast into it. The rear mount is further back and will require relocating the trans crossmember. If you get the 2WD version you will have to pay a couple extra bucks for the right output shaft. The transmission swap in my '81 is finally completed. What would you do to improve our website? We're always looking for ways to improve JEGS. 2016+ Camaro Automatic 9-Inch Direct Bolt-in Rear Conversion Kit -includes Axles and Driveshaft. 9″ Actual) Uses 4×4 1″ stickout output shaft option of TH350 for shortest length TH350 for ultra short wheelbase or vehicles with tunnel clearance issues. Hy busterswt, I've never done this job before but here goes with some suggestions which may help, T. TH400 is a 32 spline output shaft and a 4L60E is a 27 spline output, vs a jeep that is typically 23 spline for AX-15/AW-4/NV3550 so if you're shopping for used Atlas's keep that in mind. A lot of people claim that he TH350 has less drivetrain loss than the TH400, which means that all things being equal, the TH350 is going to get more power to the rear wheels from an engine with equal power. Swap it out or bend it down. One thing to consider is that the 4l60e was named th350 and 700r4 before in earlier models and the 4l80e was named th400. Fits various transmissions with a tailshafts measuring slightly over one inch. I just had to find a th400 output shaft and extension housing to convert it. The kit includes a new output shaft, a spud shaft with the 6 spline output for the Spicer 18, some bearings, a rear output bearing retainer, assorted o-rings, snap rings, and seals, and a machined plate to bolt the Spicer 18 to the Turbo 350. chevyc10) Transfer case and output shaft is different. 20 ratio 10-spline 1-in. That is what I am doing. Took the car out yesterday for the first time since the swap. Depending on the application for the TH400, you will to have the driveshaft shortened, as well. we have a 93 f350 ford c6 4wd trans and want run it only as a two wd what parts do we need, like output shaft and tailhousing. Cant remember that either right now. Not practical. Rebuilt ford transmissions. In fact, in Fast and Furious 6 and 7, almost every vehicle that you seen in the movie was powered by an LS3 and backed by a TH400 transmission. 9″ Actual) Uses 4×4 1″ stickout output shaft option of TH350 for shortest length TH350 for ultra short wheelbase or vehicles with tunnel clearance issues. The 200-4R is the same length as the TH400. On a TH400 (unless it has straight cut planetary gears) the planets will try to thrust load against the case bearing and the center support. I forget the exact number but the last time I looked at where the center output was relative to the output shaft on an. The Novak Guide to the GM 4L80E Automatic Transmission Introduction. TH350 and TH200-4R use the same yoke. I'm having a similar dilima, I have an 85 long wheel base, I swapped the 305 sbc to a bbc 454 and bolted on a th400 with the np203. I, too, have difficulty believing this when 5th gear (6 sp. How hard is it to rebuild a 700r4 transmission. It's no more work to do this swap than it is the one for the 64. Have a 32-spline input NP203 Have a TH400 need a 32-spline output shaft + adapter from a TH400/NP203 combo for a future doubler will take a complete tranny core to get the shaft and adapter if necessary. TH350 OUTPUT SHAFT 18 3/8 " TRANSMISSION GM TURBO 350 9" 2WD CONVERSION See more like this Flexplate Adapter Spacer TH350 TH400 Conversion Swap For LS Based Engines 98-04 Brand New. Can I just put a slip yolk in on my rear drive shaft or I'd there an option to change the output shaft of the tcase to fit my original drive shaft. ATI Performance Products has just released their new “Shorty” T400 tail housing made just for the TH400 GM gearboxes. We like to upgrade the forward hub at the same time. + 1965-UP GM CHEVY TH400 TRANSMISSION OUTPUT SHAFT 2WD BOLT ON YOKE THREAD. The acceleration rate of a small block versus a big block also varies because the bb develops more bottom end torque sooner. See cost comparisons farther down the page. TCI® offers many different types of conversion kits to owners of Ford, GM and Chrysler vehicles. The TH200-4R is identified by 10 bolt holes and 2 dowel-pin locator holes on the universal bellhousing. 75 PSC Double ended ram w/ PSC Pump. Iam in the middle of a TH400 swap. We wanted to took a closer look at it. The rear mount is further back and will require relocating the trans crossmember. I forget the exact number but the last time I looked at where the center output was relative to the output shaft on an. Twisted the hardened input shaft the last time at the track. Th350 swap to th400 (self. I want to swap my TH400 for a muncie 4 speed. with 25 good inches of 10 spline + holding shaft space 1 5/8 inches diameter. The next real weakness is the stock 34 element sprag. With some modification to the 2 mount bolt holes on the crossmember this extension housing can eliminate crossmember modifications when replacing a TH400 with a 4 inch tail, 9 inch tail with a 27 spline output shaft or 200-4R transmission with a 700R4 assembly. Find ATI Output Shafts 705241 and get Free Shipping on Orders Over $99 at Summit Racing! ATI output shafts offer heavy-duty performance for high horsepower. Find Advance Adapters Automatic Transmission Output Shafts 52-7002 and get Free Shipping on Orders Over $99 at Summit Racing! Are you converting your 4WD truck from a TH-350 transmission over to a 700R-4 transmission?. More information is on Novak's site Novak TH400 Adapter. The cost of this upgrade includes a Level V T56, conversion from your differential to the C6 differential, 300M LH differential output shaft, 300M RH differential output shaft and gear, HD preload springs, and full micropolish of differential internals. Was doing a LS swap but now going with a Hemi. TH400 Output Shaft ~7-1/4" Overall length. I know I will have to change the slip yoke to a 27 spline output but do I have to change my drive shaft and/or crossmember?. The TH350 (Turbo-Hydramatic 350) and TH700R4 (Turbo-Hydramatic 700-R4) can be thought of as relatives of a sort: uncle and nephew, if not father and son. Now to take the AMC TH400 that bolts to the above motors without an adapter will need a crank adapter for the pre 71 flat crank motors. 11 rear axle gears on the highway. Factory shaft for TH400/NP205 combination 1985 and newer. if this is a 4x4 your transfer. Compatible with classic and modern GM engines, as well as AMC I6 & V8 engines. Depending on the exact model of 4WD TH400 in question, there are two 32-spline versions suitable for mating an Atlas to, distinguished by the different "stickout lengths" of the output shaft. Nowadays, there are a lot more options than a Powerglide, TH350, or TH400 transmission. Most TH400 are 1" longer than above, and have a 32 spline output shaft. TH400 to 4L80E Swap for dummies, help needed (crossmembers) There were some writeups on this site on how the swap went, but nothing went too deep into the crossmember and transfer case support. (2wd does not have the right output or tailshaft. Full size output shaft is the same as th400, (31 or 32 spline. Early transfer cases mated directly to the THM400 with a cast-iron adapter, usually a vertical oval shape. The swap may require some driveshaft tunnel modification on some cars. The Jeep trans didn't have a speedo connection, so you would need to swap in a GM tail housing and output shaft to get a speedo drive. :help!: I have a TH400 like the one pictured that has a fixed yoke rather than a slip yoke. output shaft. This model is a stand-alone unit sometimes referred to as a divorce-mounted transfer case. 76 style carrier (12 7/8). Manual to Automatic Conversion. The bolt pattern for the transfer case is also the same so it will fit in a swap without problems. That's like having a 1rst gear that is 1/3 shorter. What others are saying Auto Repair Tips And Tricks Every Driver Needs To Have Time-tested Advice About Fixing Your Car Problems. Some guys are telling me that the only "short" 32-spline transmission output shaft GM made for the TH400 transmission was for the NP203 full-time case. He thought it came out of one of his roundy round 70's pontiac grand prix. A while back I posted this transmate holder, basically drops inside the engine stand base to hold the trans for work. TIMKEN 9449 REAR OUTPUT SEAL for GM TH-400 Automatic Transmission with 32 Spline Output. The TH400 has been used in GM cars and trucks and Jeep trucks. Anyway because the transmission will be fresh should I run dex6? Any things I'm overlooking such as clutch compatibility or seal compatibility. With a 400, the shaft length will need to be about 48-48. Just find one from a 83-87 that was cable drive, rob the tail shaft and the gear drive off the output shaft and swap to the other. Used on 208 transfer case with adapter. + 1965-UP GM CHEVY TH400 TRANSMISSION OUTPUT SHAFT 2WD BOLT ON YOKE THREAD. OR, just pull a th400/np241 combo out of a 3/4 ton burb or k20. You can get a AJE th400 crossmember that will go right into a fox, ordered mine last week the wait is about 2-3 weeks. Sent from my SAMSUNG-SM-N910A using Tapatalk. Can I swap the 30 spline output shaft from my 700r4 into another 700r4 that has a 27 spline output? - Answered by a verified Chevy Mechanic. It took a while for the engineers to decide on a standard gear ratio for the transmission. Although I used a new reproduction output shaft, an original 31 spline Ford shaft of the correct length would work just as well for the conversion. i can leave my phone number also mahalo thanks can you let me know how to make this trans work for 2wd. A friend just got a good deal on a built TH400 but it has the bolt in yoke. Just for kicks, I went outside and took a few pics to show you how loose this shaft is when there is no yoke in it. (No Output Shaft Modifications are Necessary) All 2wd and some 4wd 4L80E have VSS Sensors built into the transmission. I know that I need to change the tailshaft and output shaft in the trans but does that involve tearing down the whole trans?. I'm doing a th350 to th400 swap in a third gen Chevy Nova, i know about the cross member being moved back and the larger output yoke but my question is will my drive shaft need shortening? I'm thinking no considering the th400 was an option in these cars, if anyone has experience with this thanks. The latter is the one that came with the switch pitch torque converter. One tried and true transmission, the TH400, received a slight makeover into the 4L80E. I have also done some research regarding converting from a TH400 to 700r4 in my truck and the torque converter lockup is used in the TH400 for the kickdown solenoid. jeep xj cherokee steering rebuild minus ball joints(all tie rod and drag link bits new in boxes)$50. hi monster guys,alohas. Adjusting the thickness of the adapter is no big deal, we would need to get an output shaft to accommodate. Not only does. Iam in the middle of a TH400 swap. The TH400 short tail and your trans are the same length. 25 diameter tube 125 thousands wall thickness. TURBO HYDRAMATIC 250, 250C, 350, 350C 3 SPEED RWD (Lock Up & Non Lock Up) MISCELANIOUS ITEMS 900H Filler Tube & Dip Stick, OE Style 69-86 1 TH350. They will have the right stock or custom driveshafts parts you need. Typically they involve a lot of guess work, a bunch of miss ordered parts and a ton of fab time. The tube can be purchase with the collar. Billet aluminum center support. Denny's Driveshafts Slip yokes for General Motors automatic and manual transmissions in in 1310 1330 1350 and 3R series for 27 and 32 spline Powerglide T-350 T-400 Muncie Borg Warner 4L80 4L60 700R 200R M20 M21 M22 T-5 T-10 T-56 chrome moly and forged for high performance street and race car. 1985-1991 TH400 to 6 Bolt Round NP205 will Require a 4wd 4L80E or a 2wd 4L80E with a 4wd Output Shaft. But a stock shifting TH400 works fine and will. How to 4L60E to 4L80E trans swap. Sticks out ~2-1/2 " once installed. Not the TH350. use a small pry-bar or screwdriver to move the mainshaft in and out of the trans, reading play on the dial indicator. I have also done some research regarding converting from a TH400 to 700r4 in my truck and the torque converter lockup is used in the TH400 for the kickdown solenoid. The unit proved so successful over the years that Hydramatic engineers used many of the same components when they designed the fully computer-controlled 4L80-E transmission as a replacement for the TH-400. Proper shaft stickout from the TH400 is 2 1/2", and the proper SM465 output is the later model 32 spline output shaft with the round bolt pattern adapter housing. I just picked up a rebuilt th400, it's driveshaft yoke bolts on to the output shaft, and it had the short output shaft on it. The OEM forward clutch housing is bored out and fitted with an oversize 40 spline input shaft, vastly increasing surface area at the interface, eliminating housing failures. TH350 and TH200-4R use the same yoke. This seal will stop the leak where your shifter linkage connects to the transmission. 4L60E to 4L80E Swap. You could use a shaft out of a truck or car if the u-joint size is the same as the camaro. What others are saying Auto Repair Tips And Tricks Every Driver Needs To Have Time-tested Advice About Fixing Your Car Problems. Then bolt on the shorter tail housing. It’s narrower. Just find one from a 83-87 that was cable drive, rob the tail shaft and the gear drive off the output shaft and swap to the other. I just picked up a rebuilt th400, it's driveshaft yoke bolts on to the output shaft, and it had the short output shaft on it. Lt1 full Carb swap parts list and what it spark output in the upper rpms 4l60e you will have to swap over to a 700r4,th350 or th400 if you want to ditch the. TH400 aren't as good as there bragged up to be. In its original incarnation as the Turbo-Hydramatic 400, it was first used in the 1964 model year in Cadillacs. Just for kicks, I went outside and took a few pics to show you how loose this shaft is when there is no yoke in it. Rebuilt GM TH400 "Turbo 400" Automatic Transmission. The 300M shafts feature an extended bearing surface and are gundrilled to save weight with no governor or speedometer support. Swap it out or bend it down. While I was doing the swap I installed an ATI th400 overflow tank just in case any fluid comes out at the track. The issue you will run into is the transfer case/speedometer AFAIK, and that's due to the trans output shaft spline count and bolt pattern. TH400 is a 32 spline output shaft and a 4L60E is a 27 spline output, vs a jeep that is typically 23 spline for AX-15/AW-4/NV3550 so if you're shopping for used Atlas's keep that in mind. With a 1800 stall converter, the actual flash speed would be 1200, so 3600 rpm on the output shaft of the engine would mean 2400 rpm (3600-1200) after the converter. Is there a tag/stamp somewhere on the 205 case that would indicate production year and such?. One of the most popular drivetrain mods done to early Mustangs is to swap out the non-overdriven three- and four-speed transmissions with the later-model overdrive T-5 five-speed. Do you mean the ring adapter between the TH400 and the V6 or the T-TC adapter? The transmission is a vanilla TH400 with the Buick "nailhead" case and an output shaft for the Dana 20. The TH-350 is a direct swap for the Powerglide; both share transmission mounting positions, overall length, and spline count. So my th400 lost reverse so I am rebuilding it. Tailshaft End Cap Plug TH350 700R4 C4 Powerglide 2004R Output Yoke Seal. Automatic 3-Speed TH-350 2″ Tailhousing (1. Camaro and Firebird: Transmission Variation Guide. Not only does. i can leave my phone number also mahalo thanks can you let me know how to make this trans work for 2wd. With some modification to the 2 mount bolt holes on the crossmember this extension housing can eliminate crossmember modifications when replacing a TH400 with a 4 inch tail, 9 inch tail with a 27 spline output shaft or 200-4R transmission with a 700R4 assembly. The case on the left has a recently replaced Chevy short tail shaft on it. We wanted to took a closer look at it. Here is a writeup on ET loss from TH350 to TH400. Shop for discount Cobra Transmission here. How to 4L60E to 4L80E trans swap. There's a ton of information about swapping old school transmissions for the newer stuff here in the LS swap transmission guide. General Tranny Swap Information: TH375, TH350, Powerglide, TH200-4R, TH700-R4, and Muncie M21 all have the same 27-spline output shaft. TH350 TO 700R4 4X4 Transmission switch kit, Order TECKPAK FITZALL Products, filler tubes, detent cables, transmission solenoids, dust covers, flywheel shims, 4L60E wire harness, axle stabilizers, wire connectors, cooling line fittings. TH400 shifting problems. Automatic Overdrive Transmission Swap. Some of the later 4L60E models might have gone to the 6 bolt flange. If you swap in the trans and the qtrac case, then you are going to need to swap the rear axle as well b/c the quadratrac's rear output has a passenger side offset. ATI Performance Products has just released their new “Shorty” T400 tail housing made just for the TH400 GM gearboxes. It includes a new output shaft, an adapter housing, gasket, seals, and hardware. How many spline output shaft will I need on the TH400 to mate to the np241?? Thanks. PATC GM Performance Transmissions, TH400, TH350, 700R4, 4L60E, 4L80E, 6L80E, 200-4R and others. :help!: I have a TH400 like the one pictured that has a fixed yoke rather than a slip yoke. Save th400 bolt on yoke to get e-mail alerts and updates on your eBay Feed. TH400 Output Shaft ~7-1/4" Overall length. The TH400 has a 6 bolt flange at the rear of its case, and the TH350/700R4 has a 4 bolt flange, so they don't interchange. I know that I need to change the tailshaft and output shaft in the trans but does that involve tearing down the whole trans?. We wanted to took a closer look at it. seems like the decision was made for me so long 4L80E. That being said, some other aftermarket manual transmissions have either 10 or 26 splines. The unit proved so successful over the years that Hydramatic engineers used many of the same components when they designed the fully computer-controlled 4L80-E transmission as a replacement for the TH-400. The 350 for the 208 has it's own output shaft. Now you need to machine the shaft to match the length of the output shaft on a (stock) TH400. Now available with the award winning ATI T400 SFI Certified SuperCase. 11 rear axle gears on the highway. Still on the cheap route, I'm still trying to use the 205. High-Frequency GM-Style Pulse Generator. This design will replace the truck style bolt on yoke with a car style slip yoke and allow for proper slip travel and bushing contact for best performance. 875" Output Shaft. As far as the output shaft, what I want to do is change the 32 spline output shaft out of the 4L80E and put it in the TH400 that is connected to my Quadra-Trac so that I can use the NP205 that came behind the 4L80E behind my TH400. Curious about the different types of transmissions commonly found in F-Body cars? This article breaks down all the different ways you can shift gears behind your LS1 powered ride. The best way to get the right answer on the Internet is not to ask a question, it's to post the wrong answer. You'd have to find a way to get your speedo to work, tho. The factory output shaft has a spline count of 32 spline and had various output lengths. The drive shaft angle is exagerated in these drawings. Now to take the AMC TH400 that bolts to the above motors without an adapter will need a crank adapter for the pre 71 flat crank motors. I'm having a similar dilima, I have an 85 long wheel base, I swapped the 305 sbc to a bbc 454 and bolted on a th400 with the np203. The guy I got it from said to try to drill it out and if it still wont come out to bring it back and he'll swap itbut he only has a long shaft left and I don't want that, especially since he sold me a gto driveshaft from a short shaft th400. Automobile Parts and Service Toggle navigation Community Chevy Automotive Sales Inc. Note: There is a rubber gasket under the lock nut. I haven't heard of anyone trying it though. I know that I need to change the tailshaft and output shaft in the trans but does that involve tearing down the whole trans?. Full size output shaft is the same as th400, (31 or 32 spline. ls swap kits > custom driveshaft custom driveshaft sku: $309. it is the same diameter the full length of the shaft as only the tonners had. PATC builds GM performance transmissions in many levels. The TH375B is just a HD version of a TH350. Now you need to get the output shaft from a 2wd 4L80E. 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. This is due to more rotating weight existing in the larger TH400 case. This is a good used Turbo 400 output shaft with 32-splines and is the slip yoke style. That's like having a 1rst gear that is 1/3 shorter. The 300M shafts feature an extended bearing surface and are gundrilled to save weight with no governor or speedometer support. 69:1 low range, chain driven aluminum case and is a lot lighter then other cast iron case of the time. php?8164-700r4-to-th400-swap. Drove it back home the other day and bout halfway home there was alot of trans spin. PM 95bowtie (i think that's his username), local guy whonruns a manual-valve-body th400, he can answer some questions. I picked up the transmission at Dave's shop and went home to bolt it up. [/su_tab] [su_tab title="Stage 2″] Stage 2 TH400 - 750 HP/TQ capable. One thing to consider is that the 4l60e was named th350 and 700r4 before in earlier models and the 4l80e was named th400. We got it started and quickly figured out it was something in the transmission or transfer case. Our present TH400 had a cracked case, and we knew we could sell the functional 208, so we decided to rebuild the TH400 with a short output shaft for a stock TH400-205 application. See cost comparisons farther down the page. !!! yes it does suit a turbo 400 trans in a tonner. A while back I posted this transmate holder, basically drops inside the engine stand base to hold the trans for work. The drive shaft angle is exagerated in these drawings. TUB01 900H Filler Tube & Dip Stick, GM Universal Fitz All (Teckpak) 64-98 1 TH400. 700-R4 is 3" longer than the stock trans, and 2" longer than a TH400 described above. The issue you will run into is the transfer case/speedometer AFAIK, and that's due to the trans output shaft spline count and bolt pattern. 875" Output Shaft. Sent from my SAMSUNG-SM-N910A using Tapatalk. output shaft. TH400 has a 32-spline output shaft. Here is a writeup on ET loss from TH350 to TH400. This page is all about what I learned after I decided to swap the original TH400 transmission in my 1975 GMC Suburban for a TH700R4 transmission to gain the benefits of a modern overdrive transmission and help tame my "great for towing" 4. Please call for a quote as these are custom units that are built to your needs. TH400, Powerglide and 4L80E. Camaro and Firebird: Transmission Variation Guide. 20 ratio 26-spline 1-in. The next real weakness is the stock 34 element sprag. Looking to change to a stronger transmission than the rollerized redneck c4 I have so I'm not pulling it out and freshening it all the time. My clutch is a Centerforce with less than 1000 miles on it, so I'm just going to swap to a 26 spline Centerforce disc. Re: TH400 to 700R4 swap. This was because the nail head TH400 does not bolt to any AMC motor. is the distance from the rear edge of the tailshaft to the rear edge of the output. Then bolt on the shorter tail housing. From the bearing boss back, the 31 spline output shaft (shown on the bottom) is quite a bit larger in diameter. The factory output shaft has a spline count of 32 spline and had various output lengths. Although Advance Adapters offers adapters to change the Quadratrac, A new output shaft will be required for pretty much any conversion. Damn it's nasty. The bolt pattern for the transfer case is also the same so it will fit in a swap without problems. Now with a yoke in there, it would still move around a bit, but the rubber on the seal should hold it in place. As far as the output shaft, what I want to do is change the 32 spline output shaft out of the 4L80E and put it in the TH400 that is connected to my Quadra-Trac so that I can use the NP205 that came behind the 4L80E behind my TH400. Our stage 3 TH400 package includes a TH400 built by Transmission specialties. An upgraded input shaft becomes mandatory.