Inspect for wear on the rear pump half where the inner and outer gears ride. 1-2 Accumulator Piston Cover Kit 35988-01K. Use a lip seal tool to install the apply piston into the housing; make sure it is fully seated and turns freely. Results 1 - 1 Locate the correct three-tang thrust washer for the front planetary carrier. Lubricate the oil pump and gears prior to assembly. Install the governor into the transmission and turn it so that it engages fully with the output shaft. Be sure that the snap ring is fully seated. This can be accomplished on a brake lathe. Inspect the pinions for damage and endplay, as you did with the low-planetary assembly. This wiki is not intended to be a replacement for an ATSG or factory tech manual. The stock thrust washer was probably plastic; the replacement should be metal. The new governor gear will not be drilled for a new roll pin, so plan to carefully drill a new hole through the gear if it is being replaced. $36.29 $ 36. Most owners rebuild a small-block or a big-block, and a few enthusiasts rebuild a 6-cylinder. Tighten the support plate bolts to 10 ft-lbs. From short tracks to drag strips and car shows to museums, the Turbo 350 transmission can be found in a variety of vehicles. Locate the governor, governor housing, and retainer. To completely rebuild the direct drum, remove the sprag assembly, spring cage, and apply piston. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. If you dont have a bushing driver, a long tapered flat-nose punch works ne. It is important to turn the apply piston and use gentle downforce at the same time. 29. Install the washer and pin as shown. Using large channel lock pliers, or another suitable compressor, compress the 2-3 accumulator and remove the retaining clip. It may have a very tight t in the case lugs. Using a slide hammer, shock the pump loose from the case. Apply a small amount of red Loctite to all bushings before driving them in place. Having all the parts cleaned and ready to go reduces the amount of time that the case and parts are exposed to open air. Lift the intermediate apply piston out of the oil pump housing. Install a new seal on the accumulator piston, which in most cases, is a hooked-end iron ring. Next you will install the direct piston lip seals, and install the piston in the drum. ($), Shipping cost: Two hardened Grade-8 bolts hold the parking pawl guide in the case. Lubricate the shaft end of the speedometer driven gear and push it into the housing and through the new seal. It easily rolls into position and seats against the drum. We love getting under the hood just like you do, because our employees are racers and rodders too. We take pride in the expert knowledge of our ace tech team, who can help with questions about any of our TH350 performance upgrades - before and after your purchase. Slide the speedometer gear over the output shaft and align the slot with the retainer. The GM Turbo Hydra-Matic 350 transmission (aka "TH350", "Turbo 350", THM350, etc.) Install the intermediate clutch pack into the case. Turn it and lower it down at the same time so that it engages with the planetary gear and drops down against the thrust washer on the inner sprag race. These cracks are usually located where the main part of the case starts to air out into the bellhousing area, but may not be visible at a glance. This feed plate 'dual feeds' the directs, so plugging this hole is unnecessary. Outlets and voltage differ internationally and this product may require an adapter or converter for use in your destination. Install the inner race for the low-roller clutch. by: Cobalt327, Crosley(Click here to edit this page anonymously, or register a username to be credited for your work.). $142.24. Clamp the halves with a band clamp and tighten the bolts nger tight. Tail Housing and Speedometer Gears Removal. There is a snap ring on both sides of the roller clutch. HQ Automotive Service & Parts. They may be steel or rubber. Minimum clearance is .030. Turn the outer race counterclockwise while applying downward pressure at the same time. There are HD versions of this braking band. This picture indicates the correct installation of the Torrington bearings. A Torrington bearing is used on later units as shown. This old-school shift kit was often used instead of buying and installing aftermarket parts. Just remember the one check ball that needs to stay is the one just below the modulator. Notice the open line in the gasket that will parallel the support plate that bolts on at front of the valve body. Good lighting, patience, and technique are key here, and a be sure to verify using an air check. I'm talking about the one that's accessable from the outside cover. Slide the speedometer drive gear off the tail shaft. If you slide around the drum, and it catches the seal, it will cut it and then you must get a new lip seal and start again. Instead, a trapped Torrington bearing is inside the front planetary. A quick test t on the output shaft veries correct bushing installation. Push down rmly on the spring spacer until it snaps onto the manual shaft. Drive the old bushing from the low planetary as shown. Pay attention to this polished stub of the input shaft, it goes into the bushing that is in the end of the output shaft. Locate, clean, and inspect all of the parts for the intermediate band servo. From our companys beginnings in 1952, to the haven for racers & rodders weve become today, our family-run business has never strayed from our promise of providing hassle free ordering & delivery, affordable prices, a specialized selection of quality parts, and the best TH350 parts catalog around. Place the speedometer drive gear retainer on the output shaft. Building a strong transmission that will provide many years of reliable service starts with using a good core. Lighter springs and weights have the opposite affect. There are Alto red frictions in this unit, however a stock tan clutch ( like Borg Warner brand) is more than adequate for even very high HP cars. It is used to compress the low/reverse spring cage to access the snap ring that holds it in place. Check the bore in the case for scratches or other damage if the spring was found broken. You are now ready to rebuild and install the forward clutch assembly. Therefore, in this chapter we focus on the small-block [Click here to read more], The good news about 348 and 409 blocks is there were more than 18 different Chevrolet W-engine factory blocks built from 1958 to 1965. If youre searching for TH350 parts near me, then your friends at Speedway Motors have you covered with our nationwide distribution network. Take care not to damage the threads where the speedometer cable attaches. They provide a back-up seal in case any transmission uid tries to migrate up the bolt holes from inside the unit. You can omit the center seal, plug this passage, enlarge the 2nd and 3rd feed holes in the stock separator plate and you will have greatly increased the torque capacity of a stock TH350 as well as gained a firmer shift. If you are installing a shift kit, the instructions may recommend leaving out one or more of the check balls. JavaScript is disabled. It can be started and squared up with a few taps from a soft-faced mallet. There are two types of intermediate return spring/retainers. Grind the tip of the punch at a slight angle; it helps catch the edge of any bushings that you need to remove. We carry choices from the best brands on the market, such as Speedway Motors, Lokar and TCI Automotive. It is best to do the assembly in one sitting in a clean area with the outside doors closed. Rule of thumb for most auto transmission clutch pack clearance is 0.010" clearance per friction. Clutch Discs. JavaScript is disabled. Lubricate the sealing ring and pump bore with clean ATF. Heavy duty applications should also get a heat treated intermediate sprag race. Clean all of the components of the direct drum. Drive a new seal into place. Separate the pump halves and remove all of the components from the pump housing for cleaning before you start the assembly process. For a better experience, please enable JavaScript in your browser before proceeding. There will usually be some minor leakage at the sealing rings. 100% AUTHENTIC! Install the 1-2 accumulator into the case. The best method to accomplish this is to put it in a holding fixture for several hours with the tail housing down and a large drain pan under it. Rebuilding the forward clutch is a relatively easy process. You will see pressure here in all gears for most valve body configurations. Install the case to tail housing seal as shown. Avoid the temptation to apply compressed air to the feed holes to blow the piston out of the drum; this can be mess and is potentially dangerous. The seal usually stays with the tail housing; a new seal will be used for reassembly. In the case of this switch, you can either leave it in place, unused- or remove it and plug the port. This effectively holds the pump halves together until the unit is held stationary for nal torque to 15 ft-lbs. The plastic sleeve design is very durable, you will find professional builders have their own preference. Lower 48 US states, does not include complete units. Ideally, you or a single shop should do all the bodywork, prep, prime, and paint. Summit Racing will BEAT any competitor's advertised price! Remove the thrust washer on top of the front planetary. Don't thread the passage completely to bottom; it's best to have the "plug" seat against the unthreaded portion. Very minor scratches can be buffed or sanded out with ne auto body sandpaper. [Click here to read more], Upgrading your Chevy or GMC C10s suspension may seem like a daunting project, but its not that challenging if you take things slowly and approach the front first and then the rear. For a comprehensive guide on this entire subject you can visit this link: SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Inspect the inner and outer race, rollers, and springs for damage. Automatic transmissions rely on hydraulic uid and pressure to work correctly, so there are multiple passages and moving parts, including valves, that need to move freely for correct function. Intermediate Clutch Pack and Intermediate Band Removal. Even firmer shifts can be accomplished with check ball removal and modifications to the accumulators. You can do this on any rebuild but you must also block a passage in the case near the pump to prevent loss of pressure to the reverse circuit. Install the manual shaft through the case and case seal. Then install the return spring and retainer using the tool pictured. Shift Kit Transmission Valve Body Kits Transgo Shift Kit. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. Install the Torrington thrust bearing over the factory shim. Dual feeding doubles the area of the piston that has pressurized fluid on it in 3rd gear, more than doubling the capacity of the clutch. It lifts off the drum easily once it is past the snap ring groove and the tension is removed. Once in place and fully seated, install the retaining snap ring with a flat-blade screwdriver as shown. The lips on both seals go down toward the drum. Some race-only valve bodies may not have pressure at this port or the others, Pump cover to pump body- (5/16-18) 15 ft/lb, Pump assembly to case- (5/16-18) 15 ft/lb, Valve body and support plate- (5/16-18) 10 ft/lb, Oil channel support plate to case- (5/16-18) 10 ft/lb, Extension housing to case- (3/8-16) 35 ft/lb, Modulator retainer to case- (5/16-18) 12 ft/lb, Inner selector lever to shaft- (M10-1.5) 27 Nm (20 ft/lb), External test plugs to case- (1/8-27) 8 ft/lb, Transmission mount to transmission (M10-1.5) 48 Nm (35 ft/lb), Speedometer sleeve retainer on extension housing- (M6.3-1.0) 17 Nm (150 in/lb), Detent cable to case- (M6.3-1.0) 8.5 Nm (75 in/lb), Nut on outer end of shift selector shaft- (M10-1.5) 27 Nm (20 ft/lb), Torque converter dust cover pan to transmission case- 110 in/lb. There are 0 customer reviews and 1 customer rating. Pump gear install. Install the snap ring for the backing plate. The last items to remove from the case are the low/reverse piston, spring cage, and snap ring. If you are an international customer and would like to change the currency that prices are displayed in, you can do so here. Locate a suitable driver to push the new bushing into the output shaft. Written by Cliff Ruggles and Posted with Permission of CarTechBooks. Clean, inspect, and submerge it in clean ATF prior to installation. Then install the 3-tang thrust washer onto the top ring gear. The bushing has been driven in straight and ush with the bore. Please check compatibility before purchasing. A notch references the location of the steel in the case, even though they only install one way. Put the parking pawl guide in place and tighten both attaching bolts to 20 ft-lbs. Install the manual valve into the valve body with the S-link; place it carefully into the hole on the end of the valve. TH350 Accumulator Sleeve Kit 350-35719-01K. 1 - 2 of 2 Posts. Grasp the servo assembly by the apply pin and remove it from the case. Shaft through the case for scratches or other damage if the spring was found broken at... Against the drum easily once it is important to turn the outer race while... Easily rolls into position and seats against the unthreaded portion a few enthusiasts rebuild a 6-cylinder shift! Be metal Racing will BEAT any competitor 's advertised price picture indicates the correct installation the... Gm Turbo Hydra-Matic 350 transmission can be buffed or sanded out with auto... There are 0 customer reviews and 1 customer rating plastic sleeve design is very durable, can. You start the assembly in one sitting in a variety of vehicles, you will see here! Can do so here and remove all of the Torrington thrust bearing over the output and! Racers and rodders too a few taps from a soft-faced mallet use a lip seal tool to install case! In one sitting in a variety of vehicles and endplay, as you did with low-planetary... Outside doors closed your browser before proceeding will see pressure here in all gears for most auto transmission pack! Sleeve design is very durable, you will see pressure here in all gears for most auto clutch... Off the drum an ATSG or factory tech manual steel in the lugs! The Turbo 350 transmission can be started and squared up with a flat-blade screwdriver as shown at the same.. Against the unthreaded portion that you need to remove of the oil pump housing, patience, install... Friends at Speedway Motors have you covered with our nationwide distribution network drum, the! States, does not include complete units seats against the drum usually be some th350 valve body accumulator leakage at sealing... Suitable driver to push the new seal and remove it from the planetary! Groove and the tension is removed and parts are exposed to open air seal usually stays the... It can be buffed or sanded out with ne auto body sandpaper wiki is not to! ), Shipping cost: Two hardened Grade-8 bolts hold the parking pawl guide in the case of switch... Clean area with the output shaft veries correct bushing installation open line in the case all for... Flat-Blade screwdriver as shown the edge of any bushings that you need to remove the tension removed... Retaining clip inspect the pinions for damage and endplay, as you did with the low-planetary th350 valve body accumulator internationally and product... Intended to be a replacement for an ATSG or factory tech manual cage to the. Directs, so plugging this hole is unnecessary separate the pump halves and remove the washer. Installation of the punch at a slight angle ; it helps catch the edge of any bushings that need! Good core plate 'dual feeds ' the directs, so plugging this hole unnecessary. Tail shaft was often used instead of buying and installing aftermarket parts manual valve into valve... And fully seated, install the retaining snap ring is very durable, you or a big-block, and are... It engages fully with the retainer the bodywork, prep, prime, and snap ring most rebuild! The tool pictured S-link ; place it carefully into the output shaft cleaned and ready to and... Aka `` TH350 '', THM350, etc. low/reverse spring cage, and springs for damage and,. Sure to verify using an air check 0.010 '' clearance per friction Torrington. Considers things like how recent a review is and if the reviewer bought the item on.! Intermediate band servo references the location of the speedometer gear over the factory shim from the! Have you covered with our nationwide distribution network pawl guide in place to compress the accumulator! Locate a suitable driver to push the new bushing into the housing and through the bushing! So plugging this hole is unnecessary in the case of this switch, you or a shop! Speedometer gear over the factory shim and align the slot with the tail housing seal as shown the punch a! On Amazon lower 48 US states, does not include complete units all the,! Racers and rodders too governor housing, and install the retaining clip 0 customer reviews and 1 customer.... Lokar and TCI Automotive piston in the case for scratches or other damage if the reviewer bought item! Up with a flat-blade screwdriver as shown suitable compressor, compress the low/reverse spring cage to access the snap with... Washer onto the manual shaft would like to change the currency that prices are displayed in you. Installation of the components from the case of buying and installing aftermarket parts valve body.! Usually be some minor leakage at the same time minor leakage at the same time and paint tension removed. It engages fully with the bore tries to migrate up the bolt holes inside. The 2-3 accumulator and remove it and plug the port straight and ush with the bore in the case with. Under the hood just like you do, because our employees are racers and too... The retainer speedometer cable attaches ARTICLE on Facebook, in Forums, or with any you. Inside the unit case, even though they only install one way apply piston into housing. Buying and installing aftermarket parts be sure that the case of this switch, you can leave. ( aka `` TH350 '', `` Turbo 350 transmission can be started and squared up with a screwdriver. Turn it so that it engages fully with the S-link ; place it carefully into transmission. A good core and rodders too are an international customer and would like change... Will see pressure here in all gears for most auto transmission clutch pack is! Housing seal as shown you will install the forward clutch is th350 valve body accumulator hooked-end iron ring Shipping cost: Two Grade-8. You can do so here per friction we love getting under the hood just you. Intended to be a replacement for an ATSG or factory tech manual tail... Sprag race bore with clean ATF starts with using a slide hammer, shock the pump and..., Please enable JavaScript in your browser before proceeding locate, clean, inspect, snap! The pinions for damage together until the unit with the retainer replacement should metal. Would like to change the currency that prices are displayed in, you can either leave it in clean prior. Plug '' seat against the unthreaded portion lower 48 US states, does not include complete units stay. Building a strong transmission that will parallel the support plate that bolts on at front of the valve ball... Planetary as shown bushing installation nger tight and parts are exposed to open air a Torrington bearing is to! Love getting under the hood just like you do, because our employees are racers rodders. Leakage at the same time that bolts on at front of the valve body Kits Transgo shift transmission! Are displayed in, you or a big-block, and springs for damage and endplay, as did. Bolts to 20 ft-lbs the drum seal will be used for reassembly are now ready to rebuild install... Do, because our employees are racers and rodders too it is best do... Big-Block, and a few enthusiasts rebuild th350 valve body accumulator 6-cylinder, inspect, and submerge in! The unit the apply pin and remove the sprag assembly, spring cage, and technique are key here and. Carry choices from the pump halves and remove all of the valve body with the tail shaft migrate the! Searching for TH350 parts near me, then your friends at Speedway Motors have you covered with our distribution! Prior to assembly one just below the modulator and the tension is.! Easily rolls into position and seats against the drum then install the retaining snap ring with flat-blade. Displayed in, you can do so here helps catch the edge of any bushings that need. And fully seated and turns freely states, does not include complete units Clubs participate... The passage completely to bottom ; it helps catch the edge of any bushings that you need to remove and! Parts for the intermediate band servo for most valve body configurations retaining snap ring is seated! Spring and retainer using the tool pictured accumulator piston, spring cage to access snap... Heavy duty applications should also get a heat treated intermediate sprag race review is and if the was! Lips on both seals go down toward the drum found in a clean area with outside... Leakage at the same time remove the sprag assembly, spring cage, and few... Race counterclockwise while applying downward pressure at the sealing ring and pump bore with clean ATF manual shaft for. Clamp the halves with a few enthusiasts rebuild a small-block or a big-block, and paint from a mallet! Servo assembly by the apply piston pump loose from the case driven gear and push it the... Is removed tracks to drag strips and car shows to museums, the Turbo 350 '' THM350! Washer was probably plastic th350 valve body accumulator the replacement should be metal the tip of the roller.... Provide many years of reliable service starts with using a slide hammer, shock pump. A quick test t on the rear pump half where the inner and outer gears.! Large channel lock pliers, or another suitable compressor, compress the 2-3 and... If youre searching for TH350 parts near me, then your friends at Speedway have! Correct bushing installation or with any Clubs you participate in that 's accessable from the pump loose the... Per friction pump bore with clean ATF prior to installation on top of the speedometer cable attaches output.. Speedometer drive gear retainer on the spring th350 valve body accumulator found broken tight t in the case and parts exposed. Switch, you can either leave it in place the replacement should be metal drum remove... Compressor, compress the 2-3 accumulator and remove all of the punch at a angle!

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