Powerglide Gerotor Pump Stator Support Replacement Half . TH400 Alto Transmission Deluxe Rebuild Kit Level 2. Another modification is blocking the 2-3 accumulator. Wish List Compare. SKU 743602. 2. Next is the intermediate clutch pack to install into the case with the proper snap ring. Re: Water Pump bolt torque specs??. This is not a drop-in ready assembly and does not come with seals and gaskets. 101A Front Pump Gasket..... 69-86 1 TH350.GAS02 102H Valve Body Upper ... 64-98 1 TH400.DIP01 901J Retaining Clip, Governor Cover 64-98 1 TH700.RET02 NI Transmission Mount (Universal)..... 69-86 1 TH350.MOU01 TOOLS & MANUALS NI ATSG Rebuild Manual ..... 69-86 TH350.MAN01 Click here to view special tools for this transmission . The following was added by user 184.71.102.174: A universal cam bearing tool can be used to replace many bushings in the various automatics. J'ai eu l'occasion de travailler sur cette boite de vitesse montée sur la voiture (cadillac de 1972) que je restaure, plus d'infos ici.. Ce qui a motiver le démontage sont les points suivants : Photo below shows the thrust washer on the back side of the center support installed. PONTIAC 72-76 AT, RWD; TH400. The tapered side is installed up as you look into the case. Radiator hose with band-type clamp. There are three choices here, shown below: Cast iron is what most kits will contain, and what was used stock in most TH400 transmissions. A TH400 and 4L80E used in heavy towing will sometimes cause the rear bushing to "walk" to the rear, ruining the governor gear. Pictured here is a tool that allows removing the shift shaft seal without removal of the parking linkage. Quantity: TH400 Intermediate X-HD Clutch Pack Kit w-34 Element & Std. Be sure to lube the seal before re-installing, and take care not to cut it on the edges of the shifter shaft. They must be reverse pattern so that they can use the modulator valve. This Kit Includes: Friction clutch plates, standard steel plates, paper gaskets, O rings, lip seals, metal clad seals and sealing rings. The final blow came when the rear of the transmission case snapped. I use a paper towel to pad it slightly, and grip the shaft between my middle and index finger. The OEM outer spring is too large to fit into the bore first. If you drop the "nail" in the case, or anything else, it is very frustrating later on to disassemble. Remove these tubes. As the throttle is opened, vacuum decreases. $336.21 . This fits on the direct drum plate that covers the sprag. In the direct drum, leave out the center lip seal. Turbo 400 Performance Racing Transmission Parts by FTI Performance. Leave it on until you are ready to install the direct drum. 4.2 out of 5 stars 57. CORE,TH400,FOR PARTS OR REBUILD,CORE. TH400 Intermediate Shaft 300M. After you have disassembled your trans and cleaned the mostly bare case, I recommend you change the shift shaft seal, kick down connector O-ring, and rear case bushing. The center support houses the intermediate apply piston, and supports the direct drum. If you have a helper they may be able to hold the output shaft once it passes through the rear case hole and hole in the bench. All parts needed to rebuild the front pump on a TH400 transmission, 1964 and up. Use a stock bushing with red loctite and staked in place. Some performance vendors sell a brace that helps prevent case lug breakage. To use a check ball you will have to first drill the hole larger and then drive the check ball in place. There is a snap ring that goes in the case above the pressure plate pictured. Does anyone know the torque settings for the 3 bolts on the water pump?? $108.50. 3. You will need to rotate the center support into the roller clutch assembly. In most cases, it is easier to disassemble the transmission on the bench top. Add to Cart. Sprag. Even the valve body, which on the TH400 is quite simple compared to most other models, contained dozens of parts. First time builders will likely need a tech manual. Notice the actual sprag-type element used on the early style on the right. , Rebuilding , my craigslist score that wasn't a fresh , rebuild , as advertised. Diagrams supplied by General Motors and ATSG have been noted and are the property of the credited entity. Modification of the boost valve to have static line pressure and vacuum modulator replaced with aluminum plug. More. 0.040" to 0.060" clearance in the intermediate clutch with 3 frictions. Shop a large selection of Torque Wrenches at JensonUSA. 81 sold. Then the intermediate clutch stack is assembled into the case on top of the center support. Oil pump to case gasket mispositioned. Pictured is a late style reaction carrier (left) and an early style. Just replace the parts. There is a "fix" bushing for this that has a thrust surface on the front that prevents the bushing from walking. It is relatively inexpensive and can be used without pan removal with the transmission in the car. Both are not needed. Prices in USD. List price: $97.00. The center support snap ring has a taper on one side. Figure 10A-2 is the master schematic of the variable pitch oil pump … TransGo kits contain a heavy snap ring to help this, I use a center support snap ring from a TH2004R. TH400 to early NP205 = 4-1/2" (same as short 2WD output). It is not fussy, 1/4" to 3/8" wide is fine. Breather hole in pump missing or blocked. Cast iron is the easiest and will work fine for most applications but if using any type of valve body that will not require a modulator teflon is best as it will prevent wear on the direct drum. Related:th400 pump 8 bolt th400 pump rebuild kit th400 torque converter. When dual feeding the directs (as done in this build), this sealing ring is not necessary. It is best to use the upgraded retaining ring for all high-performance TH400 transmission rebuilds. The vacuum modulator senses vacuum in the intake manifold as an indicator of engine load. Use the old lip seals to be sure you select the properly sized new seals. CT4827 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 38 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, Retainer, Bracket Questions?? Recommended is an ATSG rebuild manual, and. It will not do very small bushings. Turbo Hydramatic 350 Transmission.This is Part-1 of a THM-350 on a Pontiac Trans Am. TH400 Aluminum Forward Drum and Billet Input Shaft. Install the center support bolt finger tight, then install the beveled case ring with the gap at the 9 o'clock position. NOTE: This information and photos are meant to help those who wish to rebuild their own transmission, however this is not intended to be a replacement for an ATSG or factory tech manual. The modulator on the transmission will raise the main line pressure in the transmission. This result in no upshifts since the governor is not rotating. This passage must be plugged if boost valve land is ground with flat spot. Refer to manual for checking procedures and specs. This high energy TH400 deluxe rebuild kit with friction clutches and steel plates is a complete transmission rebuild kit. The original bolt and bracket from the vacuum modulator holds the aluminum plug in place. 3/8-16 tap and set screws work. More. Pay attention to the orientation. $139.00. 5.0 out of 5 stars 18. It is held in place with some assembly grease. Compressing the accumulator for reassembly can be difficult. 4 Nm (300 kgf-cm, 22 ft. About 3% of these are Pumps. Step 8: Note Components . For a heavy duty application: 3rd gear shift use 0.150" (#25 bit, 0.1495") drill and leave the 1-2 check ball out. You must plug the exhaust hole in the valve body also designated. You want to do this before you have the trans internals assembled. Tap the hole that feed the backside, or spring side, of the accumulator piston. How to Rebuild & Modify GM Turbo 400 Transmissions (S-A Design Workbench Series), https://www.crankshaftcoalition.com/wiki/index.php?title=TH400_rebuild_tech&oldid=1076314, This information and photos are meant to help those who wish to rebuild their own transmission, however this is not intended to be a replacement for an ATSG or factory tech manual. Add to Wish List. Perform this method or the method posted above. If using a valve body with engine braking, be sure you install the intermediate band. Damaged, bent or wrong modulator. 195 Gearset. A piece of plastic (from a paint can cap) that is cut to size can be used to install and size the rings. (i.e. Recommended is an ATSG rebuild manual, and How to Rebuild & Modify GM Turbo 400 Transmissions (S-A Design … 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. Ignore the experts or online information to leave springs out of the direct drum. The factory used specific shims and selective thrust washers under the pump to set endplay. Brand New. Solid teflon is used on the 4L80 series and is interchangeable. A new 0.110" (#35 or 7/64" bit) hole needs to be drilled in the proper place to loop the governor fluid. Then disconnect the wiring (gently) from the various sensors and solenoids on the VB. Original unmodified center support is on the right in the photo. TH400: How To Recipe for 800-1000HP TH400: How To Recipe for 800-1000HP de Mountains Garage il y a 1 mois 20 minutes 1 837 vues And a few tips! Part 1 de HeadFlowInc il y a 2 ans 14 minutes et 56 secondes 52 090 vues Rebuilding , a , TH400 , for High Performance! NO Automatic shifts. BUICK 70-76 AT; TH400. Then slide the reaction tube in, shown to the rear: It is best to have the center support ready ahead of time. I prefer solid teflon, although it is the most time consuming type. $12.99 B&M 21041 Master Racing Automatic Transmission Overhaul Kit. Plug the holes in valve body. Damaged seal case bore. There was no question that a completely new TH400 was in order. SKU 165001. Do not use a plastic piston, they break. TH400 Intermediate X-Heavy Duty Billet Steel Pressure Plate. Simply grind two flats on the shift valve and deburr them. Then using a screwdriver through one of the feed holes in the valve body area, force the center support in a counterclockwise direction and tighten the center support bolt. Dual feeding the directs on a TH400 will be covered in more depth in another section. Here are the basic components of the direct drum. The next picture shows a common roller clutch style drum and a roller clutch on the left, most TH400 use this style drum. Next pull out the valve shown below. $71.88. For a firmer 1-2 shift, install a small spring on the inside of this valve. Install the piston using a lip seal installer or feeler gauge, be sure the piston depressions align with the depressions in the center support, and it sometimes helps to use a tilting motion as you install it. This firms up the 2-3 shift. The original article by jakeshoe can be seen in the Hotrodders forum thread TH400 Build Tips with Photos. High line pressure, harsh shift calibration, and fatigue cause the lugs to break here. This is the "dual feed" modification you read about. I lift it using one hand under the output carrier until I'm ready to set it into the case. First time builders will likely need a tech manual. You can plug the hole with a brass dowel or a check ball. One of the keys is to keep the TH400 line pressure under 250 psi if possible. Almost all transbrakes for TH350 and TH400's are reverse pattern manual setups. I can get a regular auto/manual t-brake for a TH400. This firms up the 2-3 shift. TH400 transmission rebuild tech. The check ball may be in the piston, it may be in the drum as circled in the drum photo. Note: One sealing ring has been left off, 2nd from top groove. You can compress it with a large pair of channel locks in order to remove the E-clip on the pin. The TH400 transmission doesn’t really require any special tools to effectively rebuild it. Method #2 to plug passage in case: You can remove the valve body and plug the hole shown in photo if pump removal is not going to happen. TH400 Oversize Piston and Center Support. This groove separates the direct (3rd gear) and reverse feeds from each other. SKU 743505. The 4L80E direct drum uses a sprag race that is 0.045 to 0.050 wider than the TH400 sprag race. Output shaft lengths (from the back of the case to the end of the shaft)... Just click the "edit" tab at the top of this page, or click one of the [edit] links to the right of an article section. Our Monster Rebuild Kits are moderately priced and offer an exceptional value for the performance minded street enthusiast. Now you will need to lift the rear assembly and install. The kickdown was originally switched either at the accelerator pedal or at the carb throttle linkage, depending on make. The regular snap rings will release due to centrifugal forces at high RPM. Availability: Product Available. Install the center support into the reaction carrier. A microswitch can be used to trigger the kickdown, or a factory switch can be used. Part Number: TS-K6100E-TH4 + ADD TO CART Questions? Wish List Compare. This torrington bearing replaces the stock thrust washer and rear selective tang washer in the TH400. The splined case lugs here in the case are one of the weak points of a TH400. $523.95 Monster Sale Price: $449.00. I prefer these types for high HP transbrake builds although not mandatory. Re-install the accumulator piston. If you plan on using a rear torrington-type bearing you want to place the bushing ever so slightly protruding to the front, so that it will locate the bearing. Most TH400s will require a .727 inch thick gear set. Billet TH400 Complete Pump Assembly [+$725.00] TH400 Billet Aluminum Forward Drum & 300M Steel Input Shaft [+$645.00] TH400 Billet Steel Clutch Hub [+$225.00] TH400 Heavy Duty Intermediate Shaft [+$459.00] Fillertube & Dipstick [+$39.00] Universal Transmission Mount [+$19.94] Trans Cooler Kit #1403 [+$49.95] Torque Converter Bolts (3) [+$9.99] Universal Dust Cover [+$25.00] Smooth Direct … 1. If you do not have the tool or wish to buy it, now is DEFINITELY the time to change the seal, it requires removal of the linkage. You can also use thin plastic (cut from a large plastic soda bottle) as a seal protector/installer, or use the proper Kent-Moore J-tools. You must also modify the 1-2 shift valve as listed below for FULL manual shift conversion: The TH400 has a over-ride shift that will shift out of low gear even if you have manually selected low. Note the direction the plastic drive gear teeth. 6. Aujourd'hui un post sur le démontage et le remontage de la boite de vitesse TH400 (Turbo-Hydramatic 400) de general motors. The reason is they use the modulator valve for the brake actuator and delete the modulator, detent, and governor circuits. More. Remove the dipstick, shifter lever, input and output speed sensors, tailhousing, pump bolts, and then the pan. No need to buy a replacement front pump if your pump body housing is still good. transmissions have this. Thicker steels take the heat of shifting better. However, there are a few procedures that can be difficult to complete without them.One is the 2-3 accumulator located in the valve body. The TH400 transmission originally in my Blazer had been a problem for quite a while. Each drum and piston assembly must have one of these check balls. This is an old draft of some TH400 oil pump technical information. THIS IS AN EARLY EDITION OF TH400 DISASSEMBLY PROCEDURES . You could leave 2-3 accumulator function in place and go slightly bigger on the feed hole. This rear assembly is relatively heavy. Please measure the thickness of your pump gears prior to ordering and ask questions if needed. Another mod is blocking the 2-3 accumulator. Pictured here driving the bushing out towards the front. This high energy TH400 master rebuild kit with ALTO friction clutches and steel plates is a complete transmission rebuild kit. Quantity: TH400 Oversize Piston & Center Support. You also use a soda pop aluminum can section. Re-Install the piston in the hole. Disassemble, clean, and re-assemble using new lip seals. These can be mixed with thinner steels used in forward drum when setting clearance. This results in a very positive 2-3 shift. 0.050" to 0.080" in each drum works well with 5 frictions. It was designed to prevent engine damage. If you purchase a thrust washer kit, it usually comes with selective shims and thrust washers to set endplay during the rebuild. You will remove the 2-3 accumulator piston, discard the spring. Price. This is shown with the pump removed from the case. Buy It Now. Center support will then slide into the assembly. After the boost valve modification, you can install an aluminum plug that blocks the modulator valve in place. 1 product rating - Fits Chevy TH400 Turbo 400 Transmission Master Rebuild Kit 1964-On Level 2. 3. 7. I believe the early style was only used on 1964-1966 models. Custom modification of the center support. More. I disassemble the rear output shaft from the output ring gear and clean and inspect the planets. Monster Sale Price: $120.12. DO NOT use a plastic piston, they break. If using teflon, be sure there are no burrs on the center support ring grooves. You must remove the 1-2 shift valve and grind two flats on the land designated by the arrow. Notice the circle around the check ball in the aluminum piston. Besides the basic rebuild, also shown here are some modifications that are not usually required, but are still good to do. 2. Be careful- the thin metal can cut the teflon rings and fingers. Sale. TH400 Billet Aluminum Pump Body Half & Fitted Gears. 5. by: Cobalt327, Crosley, Overdrive(Click here to edit this page anonymously, or register a username to be credited for your work.). Caution: A 34 element sprag needs to used if the 1-2 check ball is removed. More. I do this with a set screw. $236.25 Assault Racing Products A8492 GM Chevy Turbo 400 Polished Aluminum Transmission Pan Kit Gasket Bolts – TH400. Related: th400 rebuild kit level 3 th400 transmission th400 torque converter th400 shift kit th400 rebuild kit alto red th400 racing rebuild kit th400 transbrake th400 master rebuild kit th400 rebuild kit stage 3 th400 pump th400 transmission rebuild kit 4l60e rebuild kit Several different clutch pack configurations were used for various models, so pay close attention to what was removed from the original drum, so the total clutch pack thickness can be duplicated during the rebuild. E verything is included that we use in our transmission, see the list below for details. Near the bottom of the separator plate in photo, the hole in the round black circle (designated 'Dual Feed') should be plugged when the dual feed modifications are performed with the center lip seal removed from the direct clutch drum. ATSG covers when this is necessary, most later model ('71-up?) This rebuild kit includes all of the friction plates, steel plates, sealing rings, metal clad seals, gaskets, o-rings, rubber piston seals, front band, filter, modulator, pump bushing, and extension house bushing. Case is now prepared for pump installation. The center support must line up with the holes in the case, you can see two angle cut tangs on the center support in about the 8 and 10 o'clock positions as pictured, these can be used to line it up properly. TH400 Sonnax Extreme Main Shaft . SECTION A DISASSEMBLY AND INSPECTION OF THE OIL PUMP Figure 10A-1 is the master schematic of the oil pump and related components. - Prices are subject … You will install the rear thrust bearing into the case or the stock selective spacer in the case with the stock thrust bearing on the rear planet (using assembly gel or petroleum jelly to hold in place). Oil pump not properly seated in case. You tap the hole and install the set screw available from any hardware store. 4.4 out of 5 stars 13. TH-350 Monster Transmission Master Rebuild Kit. It was a General Motors TH400 from an early 1970s Pontiac Bonneville. Once the intermediate apply piston and the return springs, guide, retainer plate and snap ring is installed, you must install the center support to direct drum sealing rings. TH400 Aluminum Pump Body. Next, you will finish assembling the rear gear train portion for installation into the case. More. This is an OEM GM TH400 automatic transmission pump that has been cleaned and inspected to ensure that all components of the pump are ready to use in your rebuild. You can slip a 1/4" check ball into the square hole and push it into the round passage at the base of this square hole. Note: Line pressure fitting is located on driver side of transmission close to shift lever. You must install a full set of returns springs in the direct drum. Quantity + Add to Cart. 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Scarf cut teflon was used on later models of the TH400. It helps to heat the rings in hot water before installing so that they will stretch easier. Use a liquid thread locker like Loctite. If required you install the fretting snap ring into the case. This page was last modified on 23 October 2016, at 21:45. Quick View. There are three different output shaft lengths for NP transfer case applications. You can eliminate this feature by performing the following modifications to the valve body. A stock snap ring can also be tack welded to the retainer. This part is a stock 4L80E part available at a GM dealership. FULL manual shifts means just that. $422.03. Try to maintain thicker steels in the direct clutch drum. List price: $95.00. List price: $250.00. BUICK SPECIAL 69 AT; 3 speed, TH400, Skyroof SW. PONTIAC 70-71 AT, RWD; 3 speed, TH400. It requires you to lift by the center shaft, you cannot lift it by the center support as it will slide out of the reaction carrier. IF the spring is on the outer end as shown, remove the spring. Early units, pre-'71, will have the smooth inner race style drum on the right. Free 3 day shipping Free 3 day shipping. There are two steel governor fluid tubes out the rear of the main valve body.