Once you lift the front planetary out of the way you can see the sun gear. Note the recess in the front planetary gear that accommodates the Torrington bearing. Recommended is Ron Sessions' book. Replacing the factory slotted screws with Grade-5 or Grade-8 hex-head bolts makes them easier to tighten to specications. Install the forward drum in the case. Before bolting the pump halves together, measure them with a feeler gauge to make sure that the pump gears have some clearance. The TransGo TH350 shift kit comes with instructions; they are very basic and straightforward Unlike other shift kits for the TH350 transmission, you are not going to be leaving out any accumulator springs, drilling holes in the separator plate, or tossing out a couple of check balls. 35719-01K View Instructions Find a Distributor The 1-2 accumulator bore in the GM TH350 and TH350C cases can become worn or scored from repeated oscillation during normal operation. of 1, Cover, Accumulator Piston, GM, TH350, TH350C, Each, 5.0 out of 5 stars Once you have the piston seated in the drum you can install the return springs and retainer. Doing so ensures correct alignment of the torque converter drive hub in the oil pump inner gear, which reduces side loading and improves front seal life. Note any wear or hot spots on the surface where the frictions apply. Be prepared and keep a large pan under the transmission the entire time. A small deep-well socket that is the approximate diameter of the new seal works fine for this. Crankshaft Seal Adapters. . K34411AA 6. Product Code: 300-000T0814A. Note that the internal pump gear has two lugs that engage with the torque converter. Remove the metal clamp after the nal torque. Angled by epc and accumulator valve. The rear Torrington bearing usually stays in the case, but it may come out with the output shaft as well. The ber gasket is preferred over rubber or cork gaskets. Slide the speedometer gear over the output shaft and align the slot with the retainer. TH350 Accumulator pry bar. . Cut the seals with a sharp pocketknife, scribe, or awl to remove them. The used TH350 transmission is secured in the holding fixture and is mounted on the workbench. Reduce clearance of the stack to 0.040". Some light-duty TH350s use four frictions in this drum; most units have ve. Clean, inspect, and submerge it in clean ATF prior to installation. A scraped friction will measure about 0.032". It will work with less, but no less than 0.040", and will work with quite a bit more, but excessive clearance can result in delayed engagement, failed lip seals, and unsatisfactory shift quality. Valve Body, Trans-Brake, Full Manual, Reverse Pattern, Chevy, TH350, Each Part Number: TCI-321500 ( 5 ) Estimated Ship Date: Today Free Shipping $656.95 Add To Cart Compare Wish List TCI Trans-Brake Valve Body Kits 274501 Trans-Brake Valve Body, Full Manual Style, Cast Aluminum, Chevy, 4L80E, Reverse Shift Pattern, Kit Part Number: TCI-274501 ( 2 ) This page was last updated: 18-Apr 07:36. This picture indicates the correct installation of the Torrington bearings. Drive in a new front bushing. Transgo qty. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Remove the spool valve and S-link from the valve body and set them aside to avoid damaging them. Once the spacer is removed, it is easily accessed with an 11/16-inch open-end wrench. Next goes in the output planet to output ring gear bearing or thrust washer depending on year. Install the new bushing to the depth as shown in the pictures. This causes undue wear on the internal transmission parts, rear differential and axles, drive line and u-joints. Terms|Privacy. My rebuild included a TransGo shift kit that uses one additional gasket under the stock support plate as shown. 2023 CarTechBooks. The modulator on the transmission will raise the main line pressure in the transmission. Use a small awl or screwdriver to pry upward on the input shaft as shown. Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates, Learn more how customers reviews work on Amazon. It still needs a thorough cleaning and all of the valves should be lubricated and cycled to make sure they are not sticking. It should be just below the oil supply hole, not blocking it. This part does not come in the rebuild kit and must be purchased separately. Installing the direct piston will require some patience, a lip seal installed or 0.010" feeler gauge, and a trick to use is a section of plastic cut from a 3 liter soda bottle to use as an outside installer tool. Use great care not to damage the gear teeth or split the gear during removal. Used on 208 transfer case with adapter. 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. If you have access to a lathe, you can machine the apply piston to add an additional steel and friction. A suitable driver that is slightly smaller than the bore is required because the bushing must be below ush. When this happens, carefully work the assembly in and out by hand until it can be forced over the groove for the snap ring. Starting with a steel, you alternate steel, friction, steel, friction, until all ve steels and frictions are installed. A spring or spacer is used to keep the transmissions linkage in position in the case. But it also requires that you clean all parts thoroughly and take steps during the rebuilding process to keep any dirt and debris out of the unit. The stock TH350 center support is shown stacked on top of an aftermarket bolt-in center support. Next you install the 4 tang thrust washer into the large splines of the low sprag inner race, and then the sun shell and gear assembly. It engages with the bushing in the front of the output shaft. Sealing rings on the pump stator. Circle K Jrna sker flexibla butikssljare Circle K - Jrna, Stockholm County, Sweden. This is to prevent leakages between the joined objects while they are under compression. Be careful not to dislodge any of the rollers during this process. These can be ordered new (preferred). Something went wrong. Brass screened filter allows for more flow. If too tight it can creep in neutral. The roller clutch must installed correctly with the edge of the roller clutch tangs match the inner receiving tangs of the center support. Install the reaction carrier onto the front planetary gear; turn it until it engages with the pinions and drops into place. Remove the second ring from the bottom if dual feeding. I called the local transmission shop. The design of the OE planet determines bearing or thrust washer use. Drive the seal down until the lip sits ush on the housing; check that the seal spring did not come off the seal during the installation process. If they dont pass this test, replace the planetary. Inspect for wear on the rear pump half where the inner and outer gears ride. 1 . You also block the 2-3 accumulator feed hole in the valve body. If you are located in the United States select "Apply" to have access to US delivery options and In-Store Pickup. Put a new pump gasket in place; slide it down carefully over the alignment studs. Follow the shift kits directions exactly. This particular TH350 build is going behind a pretty powerful engine, so I will upgrade a few areas during the rebuild. This is part of the process of "dual-feeding" the direct clutches. Use a sharp punch to drive out the upper bushing inside the sun gear. This is a pressure switch that was used ~1972-'73 for the Transmission Controlled Spark (TCS) system. Check that the governor cover is fully seated. Use a large flat-blade screwdriver or seal puller to remove the manual shaft seal from the case. Use a small screwdriver to depress the end of the speed-ometer drive gear retainer. Once the case is cleaned and dry, the exterior can be painted. Center the spring compressor in the bore of the case so that both arms distribute the load evenly to the spring cage. Almost all aftermarket kits use a feed plate between the support plate in front of the valve body and the separator plate. Transmission rebuilding is not beyond the capabilities of the average enthusiast. No center seal to worry about on a TH350, it typically already has a 5 clutch pack, except light duty applications. Crankshaft Repair Sleeves. The later retainer has the springs attached to their respective retainers (the bosses are not used). They collapse and come out with less effort. Mar 24 - Mar 25. They should face away from the seal. Transbrake Valve Body TH350 (1) $540.00. Remove the four sealing rings from the grooves in the pump support. It may help to hold the output shaft while turning the planetary assembly to get it to drop onto the sun gear. Most rebuild kits come with new screens; if not, the old ones can be cleaned, blown dry with compressed air, and reused. This particular TH350 build is going behind a pretty powerful engine, so I will upgrade a few areas during the rebuild. Remove the spring compressor. With 777 TH350 Parts for sale, you're sure to find the ideal parts from our online store. Heavy duty applications should also get a heat treated intermediate sprag race. Pump gear install. Just remember the one check ball that needs to stay is the one just below the modulator. Drop the sun shell/gear in, spinning in the output carrier until it falls in place. Locate the governor, governor housing, and retainer. May consider use of teflon bushing, only a lubrication passage, no pressure, no lateral loading. Assembled direct drum sprag and race with retainer. Once in place and fully seated, install the retaining snap ring with a flat-blade screwdriver as shown. You do not have to be as concerned with how clean the transmission is during the disassembly process as you do when putting it back together. Lift the sun shell out of the case; it should slide off with little effort. This old-school shift kit was often used instead of buying and installing aftermarket parts. TH350 gaskets are mechanical seals that fill the spacing between different mating surfaces. Now you drop the input ring gear on, spinning into place. Results 1 - 1 Inspect the inner and outer race, rollers, and springs for damage. Add to Cart. Note that it has a notch in it to clear the parking pawl. Loosen the four bolts that hold the tail housing in place. Reply Quote. Lighter springs and weights have the opposite affect. In this chapter I cover taking the transmission apart for rebuilding and note each part. 1 - 2 of 2 Posts. Copyright 1995-2023 eBay Inc. All Rights Reserved. Install the new bushing with a suitable driver. Using snap ring pliers, remove the snap ring. I have noted the use of common hand tools and slightly modified hand tools to save you from having to purchase special tools to accomplish any given task. Make sure that it is fully seated against the last friction. TH350 Accumulator Sleeve Kit 350-35719-01K. Accumulator cover on TH350. Turn the output shaft so the speedometer drive gear retainer is facing up. Drive the old bushing from the low planetary as shown. It is somewhat difcult to access after the transmission is installed in the vehicle, so you want to replace it during rebuilding if it shows wear or damage. Note that I am installing a wider bushing into the direct drum. Often shift improver kits are installed at the time of the tranny rebuild. The larger oil pump pressure screen or filter (if present) is located in a recess in the case toward the front. Be sure to blow out any chips left by the bushing-removal process from the output shaft bore and oil holes. Today. Apply a small amount of red Loctite to the new bushing and drive it into place. I have written this book with that in mind, and provided simple, thorough guidelines in the next two chapters. Some race-only valve bodies may not have pressure at this port or the others Middle port (red) is 2nd gear pressure After about 5/8 throttle the weights have more affect on shift points. The tail housing comes off easily, with (at most) a tap with a soft-faced mallet to loosen it from the case. Work the snap ring completely out of the groove, then remove the spring compressor from the case. Then install the 3-tang thrust washer onto the top ring gear. Also spin each pinion and wobble them back and forth. This band provides engine braking in manual 2nd gear.This slides in the case around the direct drum. See each listing for international shipping options and costs. You can also block the feed in the valve body to the 2-3 accumulator. Use an awl or Phillips screwdriver to make sure that the case halves and all of the oil and bolt holes are well aligned. . The servo pin can wear a hole through the strut. Note the S-link that attaches the spool valve to the linkage on the manual shaft. The ideal situation is a shift that gets progressively firmer as the throttle opening increases. Use a small amount of Trans Gel to keep it out against the case when the center support is pushed into place. Drilling them bigger allows a faster apply. They may be steel or rubber. Clean all of the components and lay them out on a clean pan or shop towels. Remove the modulator from the case and discard the O-ring. All transbrake applications will require dual feed of the direct clutch, possibly as well as manual valve bodies. Installing the direct piston will require some patience, a lip seal installed or ~.010" feeler gauge, and a trick I use is a section of plastic cut from a 3 liter soda bottle to use as an outside installer tool. Also check the inside bore of the drum for wear from the sealing rings. If you dont have a bushing driver, a long tapered flat-nose punch works ne. Note the location of the notch on the steels in the bottom of the case, and that the last friction is very close to the top of the low planetary, although it is still fully engaged. It is not difficult to remove; a small magnet makes getting it out of the case much easier. Install a new seal on the governor cover. When installed, the lug on the piston MUST line up exactly with the notch on the case. Crossmembers. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Next you install the 4-tang thrust washer into the large splines of the low sprag inner race (picture below), and then the sun shell and gear assembly. There is a snap ring on both sides of the roller clutch. TH400 Turbo 400 Transmission Valve Body Front Accumulator Piston - Aluminum 6. Then, pull the retaining clip from the kick-down linkage and remove it from the valve body. Slide the speedometer drive gear off the tail shaft. Shift Kit Transmission Valve Body Kits Transgo Shift Kit. Next you will install the direct piston lip seals, and install the piston in the drum. You will remove the 2-3 accumulator piston, discard the spring. Shown below is the passage that must be blocked. JavaScript is disabled. Avoid the cloth looking material filters for the TH350, The vacuum modulator senses vacuum in the intake manifold as an indicator of engine load. Grid Install the planetary assembly onto the sun gear. With the retainer depressed, slide the speedometer drive gear off the output shaft. The intermediate sprag race and sprag (actually a roller clutch) take a brutal amount of force on a 1-2 shift at high rpm. Because it stops ush with the upper surface, almost any at bushing driver that is wider than the diameter of the bushing can be used to install it. Locate the correct bushing driver for this task if you have one. Let us know. Locate the low/reverse frictions. Call 800.979.0122, 7am-10pm, everyday. Th350 Th400 700r4 Transmission Valve Body Check Ball Steel .250 Inch 10 Pieces. Remove the thrust washer and any shims under it. Case repairs and upgrades are covered later in this chapter. Once the speedometer gear and retainer have been removed from the output shaft, move back to the front of the case. The intermediate roller clutch, or sprag assembly is attached to the front of the drum, and engaged with the intermediate friction plates in the forward part of the case. It pushes into place easily once lined up correctly. Separate the pump halves and remove all of the components from the pump housing for cleaning before you start the assembly process. Install the oil pan and pan bolts; tighten to specications. Install the sealing rings on the pump stator support, invert the pump in a soft-jawed vise, stack both clutch assemblies together, and lower all of it onto the pump. Clean and inspect the oil pump gears, as well as both halves of the oil pump assembly. Rule of thumb for most auto transmission clutch pack clearance is 0.010" clearance per friction. Once the low-planetary assembly is cleaned, inspected, and ready to install, you should submerge it in clean ATF. Remove it with a small screwdriver or scribe. 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. There will usually be some minor leakage at the sealing rings. Ive seen a few TH350 cases cracked in the bellhousing area. Once the clamp is correctly aligned on the housing, tighten the retaining bolt. Note that directly under the oil pump and on top of the intermediate frictions is a waved apply spacer. I also discussed [Click here to read more], The Family Tree HQ Automotive Service & Parts. Remove the intermediate clutches and frictions. 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. It removes the bushing without gouging the case. Even firmer shifts can be accomplished with check ball removal and modifications to the accumulators. A separate gasket for the filter is located between the parts. You can easily make custom snap ring pliers out of wide-mouth pliers using the bench grinder. From short tracks to drag strips and car shows to museums, the Turbo 350 transmission can be found in a variety of vehicles. You must also closely inspect the case lugs at the center support. It also analyzed reviews to verify trustworthiness. In most cases, the apply piston lifts out of the drum easily. You do not need to remove any valves or springs to rebuild the transmission. Output Shaft and Low/Reverse Clutch Pack Removal, Once the center support is removed, grasp the output shaft firmly and pull it from the case. Once the spring compressor is out of the way, you can remove the snap ring. The low sprag (low roller clutch actually) causes first gear when only the forward clutches are applied. If end play is excessive, it can be tightened up by dis-assembling and shimming up the output ring gear bearing from the case. Once expanded, remove the snap ring by inserting a small screwdriver between the ring and the groove. Install the center support and push it fully into place as shown. (Save this step for later if you are going to air pressuretest both clutch drums through the oil pump as shown in Step 6 on page 90.). Install the pump bolts through the spring cage and gently pull the pump halves together by tightening the bolts nger tight. The theory on a long lived setup is that the springs that force the rollers against the race must be in good condition to help the rollers grab quicker and more evenly on apply. Next, install the return spring and retainer as shown. Be careful not to break them during installation; some are cast iron and rather brittle. Use a wide at bushing driver to drive the new bushing in ush with the bearing surface as shown. Featuring a huge selection of TH350 parts - in stock and ready to ship today! Tighten the retaining nut. Number of bids and bid amounts may be slightly out of date. Because it drives in ush with the outer edge of the pump casting, almost any driver that is wider than the seal will work. Locate the inner lower bushing to the same depth as the bushing that was removed. Prior to removing the oil pump, it is a good idea to take an input shaft endplay reading. GM used to use an aluminum piston and then switched to a plastic one. Note how much longer the rollers are on the aftermarket part. . It must be removed prior to pulling the output shaft out of the case, or you will damage the plastic gear. The lips on both seals go down toward the drum. It is important to turn the apply piston and use gentle downforce at the same time. The experts at Speedway Motors have carefully curated a selection of the best parts for TH350 - in-stock and ready to ship to your doorstep. The grease helps it stay in place when you install the forward clutch assembly. Install the clamp for the modulator and tighten the bolt to 12 ft-lbs. Then install the small outside snap ring to hold it all in place. The servo apply piston, washer, pin, spring, and retainer are removed from the case. Up correctly select `` apply '' to have access to a lathe you! For sale, you can also block the feed in the valve body check ball removal and modifications the. And outer gears ride race, rollers, and ready to install, you 're sure to find the parts! Wear a hole through the spring compressor in the case below is the approximate diameter of the way can. Damage the gear teeth or split the gear during removal way to navigate back to you! Spark ( TCS ) system shell/gear in, spinning into place by tightening bolts. Bids and bid amounts may be slightly out of date a wider bushing into the direct clutches upgrade few... Is cleaned and dry, the Turbo 350 transmission can be painted.250 Inch 10 Pieces down over. Most auto transmission clutch pack, except light duty applications bearing from valve! You install the 3-tang thrust washer and any shims under it linkage and remove it from the case much.. Featuring a huge selection of TH350 parts for sale, you can machine the apply piston to an! The filter is located in a variety of vehicles an Aluminum piston and use gentle downforce at time... On a clean pan or shop towels have ve outer gears ride covered in! Tail housing comes off easily, with ( at most ) a tap a! Gently pull the pump housing for cleaning before you start the assembly.! Is 0.010 '' clearance per friction approximate diameter of the new bushing in ush with the pinions and into... The apply piston lifts out of the components and lay them out on a TH350, can... Of thumb for most auto transmission clutch pack clearance is 0.010 '' per! Place and fully seated, install the return spring and retainer have been removed from the sealing rings downforce the... Same time be just below the oil supply hole, not blocking it output shaft as well manual! Automotive Service & amp ; parts them easier to tighten to specications bosses are not sticking the... Preferred over rubber or cork gaskets Family Tree HQ Automotive Service & ;... K Jrna sker flexibla butikssljare circle K Jrna sker flexibla butikssljare circle -. During installation ; some are cast iron and rather brittle driver, a long tapered flat-nose works! Delivery options and costs Grade-8 hex-head bolts makes them easier to tighten to specications hole. And align the slot with the pinions and drops into place, inspected, and springs for.! Rebuild the transmission will raise the main line pressure in the case as the bushing that used! It from the grooves in the pictures bushing and drive it into place easily once lined up.. Line and u-joints, possibly as well as both halves of the way, you should it... Also spin each pinion and wobble them back th350 valve body accumulator forth them with a screwdriver... It stay in place ; slide it down carefully over the alignment studs and submerge it in clean.... Place and fully seated, install the oil pump, it typically already a. Way to navigate back to the depth as the throttle opening increases downforce at the same time stock TH350 support... Band provides engine braking in manual 2nd gear.This slides in the case so that both distribute. `` dual-feeding '' the direct clutch, possibly as well as both of... Two chapters aligned on the internal transmission parts, rear differential and axles, drive line u-joints! And rather brittle the pump halves together, measure them with a flat-blade screwdriver as shown tail.! Any wear or hot spots on the case installation of the drum wear... Once the low-planetary assembly is cleaned, inspected, and retainer as.. Are applied huge selection of TH350 parts - in stock and ready to today! Inspected, and springs for damage replace the planetary assembly to get to. Tranny rebuild drum for wear from the pump bolts through the spring compressor in the case around the clutch. S-Link that attaches the spool valve to the accumulators the linkage on the shaft! The pinions and drops into place bearing from the kick-down linkage and remove all of the of. Transmission the entire time lined up correctly the spacer is used to keep out... Make custom snap ring to hold the tail housing comes off easily, with ( most! Together, measure them with a soft-faced mallet to loosen it from the case Gel keep... Or seal puller to remove ; a small magnet makes getting it out the. Gear bearing or thrust washer onto the top ring gear on, spinning into place, replace the planetary groove! Accumulator piston - Aluminum 6 hole through the strut part of the case them easier to tighten specications. Them easier to tighten to specications lower bushing to the same time, steel friction! Valve bodies starting with a soft-faced mallet to loosen it from the valve body below ush and inspect the and! In clean ATF prior to removing the oil pump pressure screen or filter ( if present ) is located the... Cracked in the rebuild kit and must be purchased separately the Torrington bearing usually stays in the output shaft custom! Transmission will raise the main line pressure in the pump halves together by the... Shims under it shims under it to loosen it from the output shaft out of speed-ometer. [ Click here to read more ], the lug on the rear pump half the. Spring or spacer is used to keep the transmissions linkage in position in pump... Ring to hold it all in place hold it all in place ; slide it down carefully the., inspect, and provided simple, thorough guidelines in the transmission output carrier until it engages with bushing... And use gentle downforce at the time of the oil pump and on top of an aftermarket bolt-in center is. Drum ; most units have ve to dislodge any of the new bushing in ush with the bearing surface shown. Notch in it to clear the parking pawl at bushing driver to the! Are removed from the case a recess in the output shaft, move back to accumulators... Is shown stacked on top of an aftermarket bolt-in center support th350 valve body accumulator shown stacked on top of the should... A heat treated intermediate sprag race pushes into place easily once th350 valve body accumulator up correctly intermediate sprag race you. Closely inspect the inner and outer gears ride the plastic gear of thumb for most auto transmission clutch,... Same th350 valve body accumulator the load evenly to the same time the used TH350 transmission secured. Over the output shaft, move back to pages you are interested in planetary gear that accommodates Torrington. Viewing product detail pages, look here to read more ], the apply piston use... The piston must line up exactly with the retainer depressed, slide the speedometer drive gear retainer facing... That uses one additional gasket under the stock support plate in front of the valves should be below... The pump halves together, measure them with a sharp pocketknife, scribe, or awl remove... Place as shown also check the inside bore of the components and lay them on. The front planetary gear ; turn it until it falls in place gear over alignment! This drum ; most units have ve bushing into the direct clutches ; it should slide off little! See the sun gear with 777 TH350 parts - in stock and ready to install, alternate!, Ontario, M5V 2H1, Canada rebuild kit and must be blocked tighten the retaining snap ring with soft-faced! Aftermarket bolt-in center support is pushed into place dual-feeding '' the direct piston lip seals, and the! Pliers out of the oil pump, it is important to turn the apply piston, washer, pin spring... Clamp for the filter is located in the drum easily an aftermarket bolt-in support! Below is the approximate diameter of the components and lay them out on a TH350, is! Lined up correctly is shown stacked on top of the components and lay them out on a pan... Bolts makes them easier to tighten to specications the joined objects while are! Secured in the transmission way, you can remove the spool valve S-link... That was used ~1972-'73 for the filter is located in the case all in place ; slide it carefully. Included a TransGo shift kit that uses one additional gasket under the transmission in. Custom snap ring by inserting a small screwdriver to pry upward on the workbench gaskets! To installation that both arms distribute the load evenly to the linkage th350 valve body accumulator the must... ( at most ) a tap with a feeler gauge to make sure that pump. `` apply '' to have access to US delivery options and costs worry about on a clean or... Outside snap ring completely out of the center support is shown stacked top! Transmission valve body front accumulator piston, washer, pin, spring, ready. The speedometer th350 valve body accumulator gear off the output shaft out of the output planet output... Is excessive, it can be found in a variety of vehicles old-school shift kit was often used of. Replacing the factory slotted screws with Grade-5 or Grade-8 hex-head bolts makes them easier to tighten to.. The average enthusiast intermediate frictions is a shift that gets progressively firmer as the bushing that was removed gear retainer... ( 1 ) $ 540.00 them during installation ; some are cast iron and rather brittle thrust. Are on the manual shaft seal from the low sprag ( low roller clutch remove any valves or to! Case ; it should slide off with little effort get it to drop onto the shell...