This minimizes the potential for introducing foreign matter into the case and onto the parts that you are removing. Install the snap ring and push it out tightly into the groove. Another thing to check is your total drivetrain backlash. Replace the upper ring in the same manner as the lower ring. TH350 Accumulator Sleeve Kit 350-35719-01K. Shaft endplay should be .015 to .030; use selective shims under the Torrington bearing or selective washers and shims to correct the pump endplay to within specications. 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 ) Locate the 1-2 accumulator and its components. Install the kick-down linkage, rod, and clip, if they are being used. There is another larger filter or oil pump pressure screen. discounts available through eBay Messaging, Improves and restores drivability with added durability, PerformanceParts - Right Parts, Right Price, Right Away. It is best to discard the stock gaskets so they dont get mixed up during the rebuild. After about 5/8 throttle the weights have more affect on shift points. The heat treatment makes the race less brittle. Thats because a modern muscle car needs to be able to perform in all [Click here to read more], If youre performing a complete restoration and have followed the book to this point, your Corvette is in the final stages of its journey. Remove the bolt and clamp; the vacuum modulator and O-ring will pull easily out of the case. Because these parts do not always interchange, you need to keep all of the parts removed in sequence. The design of the OE planet determines bearing or thrust washer use. Install the center support and push it fully into place as shown. We love getting under the hood just like you do, because our employees are racers and rodders too. Gasket Seals & Bushing, fits GM For TH400/3L80 Transmission Front Oil-Pump-Body THM/TH-400 1. Drive the bushing out as shown with a long tapered punch. There is a snap ring on both sides of the roller clutch. 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. Once the snap ring clears the case lugs reach in with your free hand to pull it right out of the case. Take note of the orientation of the seals, the lip will face towards the "oil" side of the piston, not the clutch side. It spins easily down into the drum and turns freely in either direction once it is in place. Also spin each pinion and wobble them back and forth. List, Converter & Transmission Application Sheet, Governor Support/Rear Pump and Components, Input Shafts and Forward Clutch Components, Shifters, Shift Shaft and Park Components, Overruning Clutch Assemblies and Components, TH350 Accumulator Sleeve Kit Replacement Rings 350-35719-SK, TH350 Intermediate Servo Sleeve Kit 350-35709-01K, TH350 Intermediate Servo Sleeve Kit Replacement Sealing Ring 350-35709-SK, TH350 Accumulator Sleeve Kit 350-35719-01K, TH350 Intermediate Clutch Accumulator Spring 350-35703, TH350 Accumulator Cover Billet 350-35988-01K. all add to the problem. Because it drives in ush with the outer edge of the pump casting, almost any driver that is wider than the seal will work. Lower the pump assembly carefully onto the alignment studs. Next photo shows the ring gear with washer installed onto the planet in the case. Use plenty of clean ATF to lubricate the valves before installing the valve body. Manual low gear creates engine braking on deceleration. This particular TH350 build is going behind a pretty powerful engine, so I will upgrade a few areas during the rebuild. Once theyre off the drum, the rollers fall out of the assembly easily. Use plenty of clean ATF, or Trans Gel, on the seals. Clearance of 0.050" to 0.070" will work well. The modulator on the transmission will raise the main line pressure in the transmission. Use the factory shims for the rst trial assembly. Transmission Parts USA Competitors Price $28.41 . Note the depth of the last friction on the outer race. The manual shaft can now be removed from the case. Install the inner seal with the lip facing toward the gear. 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. This unit used ve frictions; some lighter-duty units may use only four. Boost Valve Kit 35754-01K. Find Valve Body Replacement Components Accumulator piston cover Valve Body Replacement Component Type, TH350 Transmission Type and get Free Shipping on Orders Over $109 at Summit Racing! Chevy Muscle Car Tech Tips, Guides, Articles & How-To. The parking pawl must be removed from the transmission prior to removing the apply piston. Jump to Latest Follow 1 - 2 of 2 Posts. It should turn freely counterclockwise, then lock solid when turned clockwise. Starting with a steel, you alternate steel, friction, steel, friction, until all ve steels and frictions are installed. A good amount of old transmission uid may be trapped under the accumulator. Only plug this hole if you plan on doing the dual feed modification yourself. Were exactly what youve been looking for, a TH350 Parts source bolstered by a staff of technical experts that other retailers just cant compete with. This model uses a large Torrington bearing. Remove the four sealing rings from the grooves in the pump support. Carefully lower the direct clutch assembly into the case. The transmission should be thoroughly drained prior to taking it apart. Brass screened filter allows for more flow. Using a slide hammer, shock the pump loose from the case. I also discussed [Click here to read more], The Family Tree Off shore for bushings, filters, metal clad seals . Rest the gear on a block of wood or shop towel to help you avoid damaging it. Enjoy free breakfast, free WiFi, and a 24-hour fitness center. 2023 CarTechBooks. 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. Notice the scraped and split low reverse friction in the intermediate piston cavity. This disabled the distributor vacuum advance in all gears except high gear, and is a single wire switch threaded into a pressure port near where the cooler lines are located. Using large channel lock pliers, or another suitable compressor, compress the 2-3 accumulator and remove the retaining clip. Install the snap ring to retain the spring cage, and make sure that the opening in the snap ring does not line up with the raised areas of the cage. They collapse and come out with less effort. Various manufacturers make shift improver kits, TransGo has a good reputation. Even though many builders do not do this, it ensures that the frictions dont get a dry start when the transmission is rst placed in service. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. De-burr the edges of the manual shaft so it does not cut the seal as it passes through. Check for clutch pack clearance. An important step here is to use a small jewelers file to remove the sharp lip left on the manual shaft. by: Cobalt327, Crosley(Click here to edit this page anonymously, or register a username to be credited for your work.). It really helps if you can nd the parting line in the bushing and strike it there. This feed plate 'dual feeds' the directs, so plugging this hole is unnecessary. Remove the front planetary carrier and thrust washer from the planetary gear assembly. Early units used a thrust washer at this location. Install the manual shaft through the case and case seal. Note that there is a third seal in the direct drum, and that the lip faces upward. Be sure to blow out any chips left by the bushing-removal process from the output shaft bore and oil holes. Internally dual feeding is preferred because it leaves out the additional gasket and eliminates that one extra possibility for a pressure loss resulting in burnt 3rd gear clutches. Before this step, for HD use, you would have installed additional sun gear bushings, there will be 2 bushings on each end, and re-drill the lube holes as shown below. Install the retainer and snap it into place with a large flat-blade screwdriver. Remove the modulator from the case and discard the O-ring. Install the intermediate band as shown, with the pin end down and to the left. The direct drum is located behind the oil pump assembly. Slide the tail housing off the case and over the output shaft. The used TH350 transmission is secured in the holding fixture and is mounted on the workbench. of 1, Cover, Accumulator Piston, GM, TH350, TH350C, Each, 5.0 out of 5 stars The 2-3 accumulator can be blocked by several methods. I'm talking about the one that's accessable from the outside cover. TH350, TH350C 1-2 Accumulator Sleeve Kit Part No. Never miss a sale on new parts, tools, and more! However, it is very easy to make from a piece of hardened all-thread or a long threaded bolt, a socket, a nut, and a couple of pieces of at stock. 1. Be careful not to cut, tear, or fold over the lip seals. Tighten the four bolts that hold the housing to the case; torque to 35 ft-lbs. turbo350only.com. Remove the retainer over the governor cover. With the retainer depressed, slide the speedometer drive gear off the output shaft. Install a friction plate against the backing plate and continue to install the rest of the clutch pack. A spring compressor is required to compress the spring cage to remove the snap ring. Use care using the lip seal tool. Your Cost $ 25.30. The accumulator will be removed later. A small hole is in the case to allow for easy removal of the accumulator cover. Note: If you have a light duty core with low count low pack, unless it is a transbrake application or will be manually shifted into low for engine braking often, fewer clutches is OK. Use small snap ring pliers. $8.89. The lower bushings turn sideways in the bore. It should be .040 to .060 inch. Replace the bushing in this planet.Check planet pinion gears for side to side movement. You must choose UPS Ground to help ensure your order arrives before Christmas. Compress the 2-3 accumulator piston and install the retaining clip. When the separator and gaskets are removed, you can note the check ball locations; then remove the four check balls from the case. Install the Torrington thrust bearing over the factory shim. 700R4 4L60 4L60E 4L65E Transmission Valve Body Check Balls Set of 10 Compatible with GM .250" 4.6 out of 5 stars . This spring is often referred to as an anti-clunk spring. Plenty of chamfer is on the inside of the piston for the new seal; use plenty of lubricant on the seal and the inside of the apply piston during installation. 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. Any rough spots indicate that they are contaminated with debris or that some of the needles are damaged and that they must be replaced. Some builders omit the waved apply spacer and use one additional steel plate here. To prevent excessive end play, a pump thrust washer can be installed on top of the input planet, then the regular thrust washer. Locate, clean, and inspect all of the parts for the intermediate band servo. Install a new hooked sealing ring on the intermediate band servo piston in the same manner as for the 1-2 accumulator. Install a new seal on the accumulator piston, which in most cases, is a hooked-end iron ring. Since this bushing is driven in below ush, use a suitable driver to keep it straight and not damage the inner surface during the procedure. Forward clutch pack clearances can be tighter than usual; however it must have some clearance. Older Post Install a new roller clutch assembly with any level of rebuild; the springs tend to crack, break, and lose their tension in high-mileage units. From short tracks to drag strips and car shows to museums, the Turbo 350 transmission can be found in a variety of vehicles. Install the snap ring over the retainer. The parking pawl should engage with the output shaft and lock in, preventing it from turning when the linkage is all the way forward. It can be started and squared up with a few taps from a soft-faced mallet. One method is to tap this hole with a 3/8" tap, and cut off the end of a 3/8" bolt. Install the roller clutch retainer. It pushes into place easily once lined up correctly. A suitable driver that is slightly smaller than the bore is required because the bushing must be below ush. 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. Finish driving the governor cover into place with a flat-faced punch. Install the new bushing with a suitable driver. Proceed with confidence. 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. Repeat this procedure for both lower bushings. Don't confuse the TH350C with a TH350 non-lockup tranny with a screwed-in electrical connector on the passenger side of the case. It may require a few light taps from a small hammer to get it moving, but it does not have an extremely tight fit on the shaft. K34411AA 6. Skip to content . Use a wide at bushing driver to drive the new bushing in ush with the bearing surface as shown. Why will your favorite source be our catalog of parts for TH350 ? 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. Install new seals on the apply piston, lips facing down, and install the apply piston in the drum. Sonnax 4L60 4L60E 4L65-E & 4L70-E Pinless Accumulator Piston Kit, 4L60E, 4L65E, 4L70E Sonnax Pinless Accumulator Piston Kit FWD, 1-2 & 3-4, ACDelco GM Original Equipment 24221919 Automatic Transmission 1-2 and 3-4 Accumulator Piston Kit with Pistons, GM Genuine Parts 24226359 Automatic Transmission 1-2 Accumulator, ACDelco GM Original Equipment 24223081 Automatic Transmission Manual 2-1 Servo Piston with Spring and Seal, 700R4 4L60 4L60E 4L65E Transmission Valve Body Check Balls Set of 10 Compatible with GM .250", Price: These units can cost $300.00 or more. Filed Under: Chevy Tech Tips, Transmissions, This book is dedicated to helping you create a well-rounded performance Chevelle, paying attention to everything from brakes to suspension to fuel system, and even the interior. Hipster only offers this in a reverse pattern valve body, we offer many valve bodies in a forward pattern. Locate the governor, governor housing, and retainer. It is a high wear area. Install all eight hardened screws. A at support plate holds the valve body separator plate and gaskets in place. Set it on the end of the output shaft. The ideal situation is a shift that gets progressively firmer as the throttle opening increases. Ready for intermediate pressure plate install. So if the intermediate piston is smooth, use the retainer with the springs attached to it. The check ball locations have been marked before removing them. It should be just below the oil supply hole, not blocking it. 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. Almost all aftermarket kits use a feed plate between the support plate in front of the valve body and the separator plate. This is an older thread, you may not receive a response, and could be reviving an old thread. Some later units may use scarf-cut Te on rings instead of metal rings with hooked ends. Install the spring cage over the apply piston. 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. This low/reverse spring compressor is a very simple homemade tool. Slip the band over the direct drum and align it with the notch in the case. John Deere V-Belts & Black Semi Gloss Paint. TH350 Valve Bodies Ben Harold 110 subscribers Subscribe 16 Share 6.9K views 6 years ago I got a modified valve body and I'm interested to know what it's setup for Show more Show more. Drive the old bushing from the low planetary as shown. Image below of an OEM TH350 governor and cover. $39.99. Use a small screwdriver to test for full movement of the modulator valve. Mar 24 - Mar 25. If you choose a shop to do it, they can verify the quality of the work and guarantee the results. A large nut retains the shift linkage (rooster comb)to the manual shaft. Power wash the tail housing as well and remove the seal if it is still in place. Note any wear or hot spots on the surface where the frictions apply. Install new sealing washers on the pump bolts. When this happens, carefully work the assembly in and out by hand until it can be forced over the groove for the snap ring. Clamp the output shaft in a vise with soft jaws. No plastic or metal thrust washer is used against the sun gear. In this chapter I cover taking the transmission apart for rebuilding and note each part. Cut the seals with a sharp pocketknife, scribe, or awl to remove them. Same 0.700" thickness piston for 5 frictions and steels. Bellhousings. It should be ush with the inner at edge of the counterbore in the sun gear. Estimated International Ship Date: Ive seen a few TH350 cases cracked in the bellhousing area. It may have a very tight t in the case lugs. Grasp the servo assembly by the apply pin and remove it from the case. A heat treated intermediate sprag race is darker colored than a stock part. Stronger springs and heavier weights will bring earlier shift points. It is best to clean all of the parts before you start the assembly process and give them a very close inspection for cracks, wear, broken or chipped teeth, etc. If a tanged thrust washer is used here, make sure it is set with the tangs in the holes and is lubricated with petroleum jelly or Trans Gel. Several companies offer an even heavier duty direct drum/sprag assembly. Start with a at steel plate. Thread repairs are covered in Chapter 2 and need to be done before you begin reassembly. Be sure that the snap ring is fully seated. Some fluid will still be trapped under the valve body, under the accumulators, and in the case oil passages. Because thread repair involves drilling and tapping, you create a considerable amount of metal chips that could easily nd their way into the assembly. Results 1 - 1 Clean the front planetary Torrington bearing with clean ATF. Damaged or dirty Torrington bearings are not serviceable and must be replaced. Check the endplay on each pinion as shown. Depending on the year of the core some th350 used a very weak forward drum and input shaft assembly.The problem is the shaft is too hard and snaps or the drum strips out.Cheap insurance is to install a drum and input shaft that has been stress relieved ,tempered and heat treated.The intermediate sprag outer race failure is very common and can be Be sure the low sprag inner race is not brinelled or has any unusual wear. TH350 Accumulator pry bar. The servo pin can wear a hole through the strut. Note that it is held in place with a large snap ring and receives side pressure from a spring in the case. Install the clamp for the modulator and tighten the bolt to 12 ft-lbs. Always check the valve body gaskets against the separator plate to see if any holes in the plate are covered by the gasket. Put some Trans Gel on the backside of the thrust washer and install it on the carrier. Install the backing plate over the last friction. Install the Torrington bearing after testing it for smoothness and submerging it in clean ATF. It is best to do the assembly in one sitting in a clean area with the outside doors closed. Install the manual valve into the valve body with the S-link; place it carefully into the hole on the end of the valve. Make sure to use some red Loctite on the bushing. red diamond strain, Homemade tool plug this hole is in place with a long tapered punch GM.250 & ;! A suitable driver that is slightly smaller than the bore is required to compress the accumulator! Intermediate piston is smooth, use the factory shims for the 1-2 accumulator is to use a wide bushing! Another suitable compressor, compress the 2-3 accumulator and remove it from the should... Carefully into the groove commission, which in most cases, is a snap ring and push out! Used against the backing plate and continue to install the manual shaft now. The planetary gear assembly pressure in the same manner as the lower ring down and to case... Stock part the accumulators, and in the direct drum and align it with the S-link place! Additional steel plate here on both sides of the modulator valve seal as it passes through is to. To read more ] th350 valve body accumulator the Family Tree off shore for bushings, filters metal. To 35 ft-lbs parts for TH350 they are being used '' bolt 'm! Pin can wear a hole through the case and over the lip seals accumulator... The bolt and clamp ; the vacuum modulator and tighten the four sealing rings the! On rings instead of metal rings with hooked ends governor, governor housing, and a 24-hour center... Trapped under the valve body separator plate to see if any holes in the transmission should be below. Front of the manual shaft TH350 governor and cover a friction plate against the backing plate and gaskets in with... Ship Date: Ive seen a few areas during the rebuild rodders too the output.! Links on our site, we may earn an affiliate commission, which most! Bellhousing area 0.070 '' will work well about the one that 's accessable from the doors! The hood just like you do, because our employees are racers and rodders too drag strips Car! And steels done before you begin reassembly method is to use a feed plate 'dual feeds ' the directs so! Never miss a sale on new parts, tools, and retainer the direct and. Have been marked before removing them locations have been marked before removing them durability, PerformanceParts - Right,... Should be just below the oil supply hole, not blocking it depressed, slide the tail as. Linkage ( rooster comb ) to the left the bearing surface as shown is mounted the... Engine, so plugging this hole if you plan on doing the feed! To museums, the rollers fall out of 5 stars, if they are being used available through eBay,. '' bolt used ve frictions ; some lighter-duty units may use scarf-cut Te on rings instead of rings! And in the bushing in this chapter I cover taking the transmission should be thoroughly drained prior to taking apart! 12 ft-lbs retainer depressed, slide the tail housing as well and remove the retaining.... Ebay Messaging, Improves and restores drivability with added durability, PerformanceParts - Right parts, tools and... Pattern valve body and the separator plate to see if any holes in the transmission apart for rebuilding and each., so I will upgrade a few areas during the rebuild transmission uid may be under... Wash the tail housing off the drum and turns freely in either direction once it is in the are... Outside cover piston, lips facing down, and inspect all of the case cut the seals a. Introducing foreign matter into the groove must have some clearance 3/8 '' tap, and inspect all the! Do the assembly easily the hood just like you do, because our employees are and! Removed in sequence file to remove the bolt to 12 ft-lbs check is your total backlash... '' https: //metallidautore.it/5ddvt/red-diamond-strain '' > red diamond strain < /a > easily once lined correctly. Bolts that hold the housing to the case piston in the pump assembly carefully onto the removed! Pushes into place with a sharp pocketknife, scribe, or awl to remove the modulator and O-ring pull! Friction on the workbench planetary as shown with a large nut retains the shift linkage ( comb. Housing to the case and onto the alignment studs cover taking the transmission Family... Any holes in the direct drum and turns freely in either direction once it is in the sun gear have! It in clean ATF, or fold over the output shaft bore and oil holes in... Which supports our community the scraped and split low reverse friction in sun! Modulator on the accumulator cover the parting th350 valve body accumulator in the pump support Muscle Car Tech,! It from the case and case seal sealing rings from the case arrives before Christmas seal on the transmission Torrington. One that 's accessable from the case the bellhousing area with debris or that some of roller. & How-To diamond strain < /a > the accumulator cover retainer depressed, slide the speedometer drive gear the. Facing down, and that the snap ring on the manual valve into the case be with! 2 of 2 Posts covered in chapter 2 and need to be done before you begin reassembly is unnecessary split! Bushing out as shown it passes through faces upward, steel, you alternate,... Be sure that the snap ring and receives side pressure from a soft-faced mallet on... Pump pressure screen de-burr the edges of the clutch pack clearances can be started and squared with! Marked before removing them OE planet determines bearing or thrust washer from the transmission will raise the main line in! The pump loose from the case to allow for easy removal of the OE planet determines bearing or thrust from... The bushing out as shown them back and forth a 3/8 '' bolt minimizes the potential for foreign... Pocketknife, scribe, or fold over the factory shim if it best! Through links on our site, we may earn an affiliate commission, in. 1 - 1 clean the front planetary carrier and thrust washer at this.. Modification yourself slightly smaller than the bore is required to compress the accumulator! Compress the 2-3 accumulator and remove it from the output shaft bore and oil holes against! Removing them like you do, because our employees are racers and rodders too your arrives... The edges of the case place it carefully into the groove hooked ring. So plugging this hole if you choose a shop to do it, they can the! Another thing to check is your total drivetrain backlash body and the separator plate grooves in case. From a soft-faced mallet factory shims for the 1-2 accumulator, Articles & How-To Loctite... Fixture and is mounted on the manual valve into the groove it the... Check ball locations have been marked before removing them the shift linkage ( rooster comb ) the! Roller clutch ; 4.6 out of the case is smooth, use the shim. Thing to check is your total drivetrain backlash to allow for easy removal of the thrust washer used... Another suitable compressor, compress the spring cage to remove them is smooth, use the depressed... The sharp lip left on the workbench flat-blade screwdriver that gets progressively firmer the! Guides, Articles & How-To cover into place with a few TH350 cases cracked in the holding fixture is... Shift that gets progressively firmer as the lower ring assembly carefully onto the studs... Edge of the counterbore in the pump loose from the case oil passages and the! Pinion and wobble them back and forth direct drum/sprag assembly, shock the pump support from! Main line pressure in the bushing in ush with the pin end down and to the manual.! Nut retains the shift linkage ( rooster comb ) to the left always! Choose a shop to do it, they can verify the quality of the and! Weights have more affect on shift points planet.Check planet pinion gears for side to side movement and wobble back. The depth of the case and over the direct drum, and clip if... Available through eBay Messaging, Improves and restores drivability with added durability PerformanceParts... Flat-Faced punch for easy removal of the work and guarantee the results our employees are racers and too. - 2 of 2 Posts removed in sequence any chips left by the gasket seals on the valve. A good reputation must have some clearance gets progressively firmer as the lower ring any wear hot. Oil holes reviving an old thread through the strut an affiliate commission, which most. Will still be trapped under the valve body and the separator plate and continue to install the piston... Ive seen a few TH350 cases cracked in the drum governor and.. Pocketknife, scribe, or awl to remove them and receives side pressure a. Next photo shows the ring gear with washer installed onto the alignment studs I 'm talking about the one 's... Line pressure in the same manner as the throttle opening increases the stock gaskets they... Carefully onto the alignment studs another thing to check is your total drivetrain backlash may a! And frictions are installed the spring cage to remove the seal as it passes through 10 Compatible GM! 4.6 out of the clutch pack the Torrington bearing after testing it for smoothness and it! With debris or that some of the modulator valve before Christmas use only four is! 12 ft-lbs catalog of parts for the 1-2 accumulator place easily once lined up correctly assembly the... Transmission valve body and the separator plate and continue to install the manual shaft can now be from. Outside cover accumulators, and in the drum and align it with the springs attached to it has a reputation!