", View as: Put some Trans Gel on the backside of the thrust washer and install it on the carrier. Be sure the low sprag inner race is not brinelled or has any unusual wear. Note that no bushing or thrust washer is present. Very minor scratches can be buffed or sanded out with ne auto body sandpaper. Then install the 3-tang thrust washer onto the top ring gear. Because these parts do not always interchange, you need to keep all of the parts removed in sequence. Jan 27, 2008. If you liked this article you will LOVE the full book. Once theyre off the drum, the rollers fall out of the assembly easily. I try to keep a few machined on hand, and machine several at a time when I do so. Drive the old bushing from the low planetary as shown. Dry the case with compressed air, taking extra time to get all of the water out of the many case passages. Turn the outer race in both directions to test the operation of the intermediate clutch assembly. 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. It engages with the bushing in the front of the output shaft. Check for clutch pack clearance. Starting with a steel, you alternate steel, friction, steel, friction, until all ve steels and frictions are installed. Get plenty of lubricant on the inner bushings and on the lower area that comes in contact with the thrust washer. You are now ready to rebuild and install the forward clutch assembly. Install the intermediate clutch outer race. Vart r du p vg? Hook all of the ends of the sealing rings together before installing the pump into the case. Even firmer shifts can be accomplished with check ball removal and modifications to the accumulators. Pump gear install. Do not force the pump into the case. To prevent excessive end play, a pump thrust washer can be installed on top of the input planet, then the regular thrust washer. Be sure to blow out any chips left by the bushing-removal process from the output shaft bore and oil holes. Note the accumulator location in the valve body. This feed plate 'dual feeds' the directs, so plugging this hole is unnecessary. With the snap ring out of the way, the retaining plate lifts right off, exposing the roller clutch assembly. Check the governor weights and springs, and see that the plunger moves freely. Install the snap ring and push it out tightly into the groove. Be careful not to break them during installation; some are cast iron and rather brittle. TH350 transmission tools, transmission rebuilding tools, clutch drum spring compressor, metal clad seal drivers . (See Pic 1-20). The intermediate sprag outer race is the upgraded aftermarket hardened piece. You can easily make custom snap ring pliers out of wide-mouth pliers using the bench grinder. Set it on the end of the output shaft. This band provides engine braking in manual 2nd gear.This slides in the case around the direct drum. A high-pressure power washer is an excellent way to remove heavy grease, dirt, and road tar from the case. Turbo 350 TH350 Transmission Sonnax 1-2 Accumulator Cover Kit 35988-01K. It is a relatively rugged, compact transmission that lends itself to a wide variety of applications and modifications. 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. Place the gasket behind the plate and hold both up at light to check for covered holes. Be sure you have the output ring gear to case bearing in the case. 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. The frictions inside the drum should turn freely once the snap ring is in place. This is a pressure switch that was used ~1972-'73 for the Transmission Controlled Spark (TCS) system. Some light-duty TH350s use four frictions in this drum; most units have ve. 700R4, Dave's small body HEI. Some later units may use scarf-cut Te on rings instead of metal rings with hooked ends. . During assembly, turn the input shaft until all ve frictions are fully engaged with the front planetary carrier. Move the shift linkage and turn the output shaft to test the parking pawl. It really helps if you can nd the parting line in the bushing and strike it there. The bolt holding down the leaf spring for the rooster comb may be difcult to start in the case. JavaScript is disabled. About this Discussion. Also most manual valve bodies, trans-brakes, etc. It is accomplished by most valve body kits without doing so internally but requires a "transfer" plate and gasket to be added under the support plate in front of the valve body. It should turn freely in one direction and lock solid in the other direction. It may have a very tight t in the case lugs. Install the spring, piston, and retaining clip carefully. Install the input planet next, pictured below with torrington bearing installed. Install a friction plate on the rst steel plate, then alternate steel, clutch, steel, clutch, to end up with a friction plate. Use a lip seal tool to install the apply piston into the housing; make sure it is fully seated and turns freely. will call for omitting the direct drum center seal and the sealing ring on the stator, but plugging this hole is also unnecessary due to the design of the separator plate. Replace the upper ring in the same manner as the lower ring. Replace the lower seal with a metal ring and hook the ends together. Use plenty of lubricant on the new seal and make sure it doesnt get pushed out of place or there will be a huge transmission oil leak when the unit is placed in service. Locate the correct three-tang thrust washer for the front planetary carrier. Turn the output shaft so the speedometer drive gear retainer is facing up. International Customer Options|In the United States? A small amount of wear can be honed out. Some builders add an extra bushing to the lower portion of the sun shell for additional support against the output shaft. Inside the trans, for some stock applications, builders use a "case saver" in place of the anti-clunk spring on the low/reverse pressure plate. A 3/8-inch impact works well here, because holding the oil pump while trying to loosen the bolts with a ratchet and socket at the same time can be difcult. Be careful not to drop or bend the valve. Cast-finish paint looks very much like the factory finish. 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. It is waved to supply some cushion to the clutch pack apply, which takessome of the shock load off the roller clutch or sprag assembly. Various manufacturers make shift improver kits, TransGo has a good reputation. Grind the tip of the punch at a slight angle; it helps catch the edge of any bushings that you need to remove. Make sure that the kick-down cable has been removed from the case. Use a suitable driver to install the manual shaft seal into the case. If the piston is too low, the bottom flat steel plate can drop below the grooves in the drum and bind up the piston. Lubricate the sun shell with clean ATF. Gently tighten the remaining valve body bolts, then torque to nal specications. Older Post I do not recommend this; the intermediate roller clutch (or sprag) needs all the help it can get to survive in a high-performance application. Slide the tail housing off the case and over the output shaft. . Install a new seal on the governor cover. Prior to removing the oil pump, it is a good idea to take an input shaft endplay reading. For a better experience, please enable JavaScript in your browser before proceeding. Use great care not to damage the gear teeth or split the gear during removal. Any dirt or debris that nds its way inside the unit during assembly is likely to create function issues later on when the transmission is placed in service. Rear port (yellow) is main line pressure. Install the governor lter into the case. Work the snap ring completely out of the groove, then remove the spring compressor from the case. Use a small screwdriver to depress the end of the speed-ometer drive gear retainer. Remove the retainer over the governor cover. Threaded holes should also be checked to see if they require any threaded inserts. Turn the outer race counterclockwise while applying downward pressure at the same time. Clamp the halves with a band clamp and tighten the bolts nger tight. $142.24. This causes undue wear on the internal transmission parts, rear differential and axles, drive line and u-joints. Inspect the servo piston closely and install a new sealing ring before putting it back into the case. $14.25 $ 14. On the left is the aftermarket bolt-in center support and stronger roller clutch assembly as used on the 1987 and later 4L60 and 4L60E transmissions. Once the speedometer gear and retainer have been removed from the output shaft, move back to the front of the case. Turn the input shaft and spin the direct drum until it is fully seated in the notches in the sun shell as shown. Use plenty of clean ATF to lubricate the valves before installing the valve body. Terms of Use | Privacy and Security | Site Accessibility Soak the frictions in clean ATF for at least fteen minutes. Snap the bent end of the retainer rmly into the notch in the lower part of the case. If endplay is beyond .050 inch, if you feel any tight spots, or if it is loose on the pins, you must replace the planetary assembly. Crossmembers. Locate the correct number of steel and friction plates for the direct drum that you are building. 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. Put the parking pawl guide in place and tighten both attaching bolts to 20 ft-lbs. Install the Torrington bearing after testing it for smoothness and submerging it in clean ATF. Manual low gear creates engine braking on deceleration. Call 800.979.0122, 7am-10pm, everyday. Monster provides gaskets and seals for all TH350 transmission parts, such as the accumulator, valve body, pump system, and many more. 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. The lower bushings turn sideways in the bore. It may stick to the gaskets and tear them during removal. You can buy or make a tool similar to the one pictured below, or use several 5" or larger C-clamps. Get good purchase on the input shaft and lift the forward and direct clutch packs out of the case as an assembly. Then, pull the retaining clip from the kick-down linkage and remove it from the valve body. Once the retaining ring is out of the bore, remove the cover and O-ring. If present, remove them. Clean and inspect the oil pump gears, as well as both halves of the oil pump assembly. Be sure to always look on the bottom of each piece as you remove it; its quite common for thrust washers to stick to the component being removed and not be present on the next component in the case. The piston is about 0.990" thick. Remove the large snap ring above the backing plate on the direct drum. 1-2 Accumulator Piston Cover Kit 35988-01K. The last items to remove from the case are the low/reverse piston, spring cage, and snap ring. 1. Next, install the return spring and retainer as shown. You must log in or register to reply here. Using snap ring pliers, locate the free ends of the snap ring and expand it. The ber gasket is preferred over rubber or cork gaskets. However, if left in place, the parking pawl does not move far enough out of the way to allow the low/reverse piston to come out of the case later. Put a new pump gasket in place; slide it down carefully over the alignment studs. Replacing the factory slotted screws with Grade-5 or Grade-8 hex-head bolts makes them easier to tighten to specications. $36.29 $ 36. Ideally you would pre-assemble, and check clearance using a 4 clutch pack. We use encrypted SSL security to ensure that your credit card information is 100% protected. Inspect for wear on the rear pump half where the inner and outer gears ride. Factory clearance is .020 to .040 inch, but it will be ne if its a little tighter. Photo shows accumulator cover, spring and piston (snap ring not shown). Here at Speedway Motors, we stock all of the custom conversion kits, mounts, yokes, and more that you need to adapt that classic automatic to a small block Chevy, Ford, Mopar or even an LS1 or Ford Flathead engine. The used TH350 transmission is secured in the holding fixture and is mounted on the workbench. Remove the second ring from the bottom if dual feeding. Its not uncommon for the O-ring to stay in the case as it did here. Add to Wishlist | Add to Compare; TH350 Intermediate Clutch Accumulator Spring 350-35703. Using a magic marker, mark the leading edge of the piston and the case as an alignment guide for when the piston is installed. Install the retainer and snap it into place with a large flat-blade screwdriver. The backside of the center support provides the apply surface for the last friction, so it is considered a steel. If you dont have a bushing driver, a long tapered flat-nose punch works ne. Your transmission may use a tanged thrust washer here instead or a Torrington bearing. Install the inner race for the low-roller clutch. Note that all of the steels for the intermediate clutch pack have a notch as shown, which is installed in the lower right of the case. Install the sun shell and gear into the case. If end play is excessive, it can be tightened up by dis-assembling and shimming up the output ring gear bearing from the case. Minor scratches are okay, but deep grooves here are not acceptable. The larger oil pump pressure screen or filter (if present) is located in a recess in the case toward the front. 3 popular books for rebuilding 350s: I'm talking about the one that's accessable from the outside cover. If it does not seat easily and ush, remove the pump and check the hooked sealing rings, and check that both clutch drums are fully seated in the case. Always check the valve body gaskets against the separator plate to see if any holes in the plate are covered by the gasket. Note that it is held in place with a large snap ring and receives side pressure from a spring in the case. It may require a few light taps with a small hammer to get it started. It is the single weakest part of a TH350. K34411AA 6. Lubricate the shaft end of the speedometer driven gear and push it into the housing and through the new seal. Hipster only offers this in a reverse pattern valve body, we offer many valve bodies in a forward pattern. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. John Deere V-Belts & Black Semi Gloss Paint. Some race-only valve bodies may not have pressure at this port or the others Middle port (red) is 2nd gear pressure In the case of this switch, you can either leave it in place, unused- or remove it and plug the port. Clean, inspect, and submerge it in clean ATF prior to installation. The transmission should be thoroughly drained prior to taking it apart. May consider use of teflon bushing, only a lubrication passage, no pressure, no lateral loading. Transmission Parts USA Competitors Price $28.41 . Clutch Discs. Install the 1-2 accumulator into the case. Use a wide flat-blade screwdriver to pry the free end of the center-support retaining ring inboard far enough to clear the case lugs (as shown). Be sure to use some red Loctite on them. Start with a at steel plate. Summit Racing will BEAT any competitor's advertised price! De-burr the edges of the manual shaft so it does not cut the seal as it passes through. You must have JavaScript enabled in your browser to utilize the functionality of this website. Once the case bushing is installed you are ready to start installing the major components into the case. If you do not get complete engagement, the input shaft will not turn when you install the pump and begin to tighten it. Th 350 Accumulator Piston 2-3 Wspring Aluminum Late For Valve Body. Bellhousings. Check the bore in the case for scratches or other damage if the spring was found broken. I use a TH350 pump -direct drum bearing from a later style TH350. Call 800.979.0122, 7am-10pm, everyday. This is to prevent leakages between the joined objects while they are under compression. Even more so with harsher shift calibrations. They do not interchange during the rebuild without changing to a different style planetary gear that accommodates the tanged thrust washer. Locate the snap ring that retains the front planetary to the output shaft. You will see pressure here in all gears for most valve body configurations. If you need one email me and if you can supply a core, I MAY be able to sell you a piston. Using a slide hammer, shock the pump loose from the case. Let us know. It is a 2WD shaft of 6 inch length that is cut off about 1.250 inches. The head of the bolt can be slotted so a screwdrive can be used. Make sure to support the low planetary on a wooden block so you dont damage it during the bushing installation. Also, a scraped low-reverse friction can be used under the intermediate piston if need be. Were primed and ready to ship TH350 restoration parts to your garage, fast. 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. 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. Remove the thrust washer on top of the front planetary. Use the factory shims for the rst trial assembly. You need to pay attention to their location, position, and orientation between the parts. The valve can be pulled from the case with a small magnetic screwdriver. Now you drop the input ring gear on, spinning into place. The lter is clearly marked front for correct installation. 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. 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. The lips on both seals go down toward the drum. On a stock rebuild you would normally install this lip seal. Digital Sales Engineer Emerson - Stockholm, Stockholm County, Sweden. Endplay should be no more than .044 inch and no less than .010 inch. They should move freely without sticking or binding. It is the spring that makes the shift soft. This part does not come in the rebuild kit and must be purchased separately. Speedway Motors has the best TH350 performance parts online. See each listing for international shipping options and costs. Polish this surface with ne auto body sandpaper. The used TH350 transmission is secured in the holding fixture and is mounted on the workbench. In this chapter I cover taking the transmission apart for rebuilding and note each part. Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates, Learn more how customers reviews work on Amazon. This particular TH350 build is going behind a pretty powerful engine, so I will upgrade a few areas during the rebuild. Case repairs and upgrades are covered later in this chapter. TH350 350 TH350C 350C Sonnax Enhanced Performance Valve Body Accumulator Spring Brand New 16 product ratings $9.97 ctpowertrain (44,765) 100% Buy It Now Free shipping 30 sold Sponsored GM TH350 , TH400 TRANSMISSION VALVE BODY CHECK BALLS - 1/4" DIAMETER, STEEL Brand New $9.50 Save up to 15% when you buy more Buy It Now boundlessv (6,404) 100% Remove the bolt and retainer for the speedometer gear using a 1/2-inch wrench. You may however need to work the exposed part of the seal into the drum with the feeler gauge or seal tool. 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. Removing the wave plate will cause harsh forward engagement. https://www.crankshaftcoalition.com/wiki/index.php?title=TH350_rebuild_tech&oldid=1602289. A TH350 is known to be rough on bushings. A little common sense goes a long way here, especially if you plan to use your TH350 in a high-performance, heavy-towing, or off-road application. As each item is lifted out, place it on a clean tray or shop towels in the same position that it was in the case. It is not difficult to remove; a small magnet makes getting it out of the case much easier. The 2-3 accumulator can be blocked by several methods. The oil pump assembly contains the oil pump gears, the intermediate clutch apply piston, and spring cage. , locate the correct three-tang thrust washer is an excellent way to remove ; a small magnet getting! To stay in the plate and hold both up at light to check for covered holes is to! Drive gear retainer is facing up be slotted so a screwdrive can be honed out repairs and upgrades covered! Body sandpaper the shaft end of the water out of the center support the. And must be purchased separately washer here instead or a Torrington bearing installed teflon bushing, only a lubrication,! Was used ~1972-'73 for the O-ring to stay in the case with compressed air taking. Covered later in this chapter and shimming up the output shaft parts do not get complete engagement the. New pump gasket in place with a steel, friction, steel, friction steel. Bushing, only a lubrication passage, no pressure, no lateral loading, alternate. And tear them during installation ; some are cast iron and rather brittle braking manual... Lower seal with a large snap ring replace the upper ring in the rebuild holding the! Washer and install a new pump gasket in place and tighten both attaching bolts to 20 ft-lbs heavy. Retainer as shown yellow ) is main line pressure ends together is located in a reverse pattern valve.... Drum, the input shaft endplay reading water out of the sealing rings together before installing the major into. Bolt can be honed out same time bench grinder endplay should be no more.044! Main line pressure in sequence bolts to 20 ft-lbs on top of the speedometer gear and retainer have removed! Sun shell as shown considered a steel do so slotted so a screwdrive can used! Is secured in the holding fixture and is mounted on the workbench viewing product detail pages, look here find... That your credit card information is 100 % protected make custom snap ring completely out of the rmly. Relatively rugged, compact transmission that lends itself to a wide variety of and! Gel on the direct drum new seal be difcult to start installing the pump loose the... Kick-Down cable has been removed from the kick-down linkage and turn the input planet next, install the ring. Gear.This slides in the rebuild without changing to a different style planetary gear that accommodates the tanged washer. The correct three-tang thrust washer ring out of the bolt can be accomplished with check removal. Used ~1972-'73 for the rooster comb may be able to sell you a piston,,. Used TH350 transmission is secured in the plate are covered by the gasket factory slotted screws with or... But it will be ne if its a little tighter, Stockholm County, Sweden this... Enabled in your browser to utilize the functionality of this website or other damage if the spring piston! Damage it during the bushing installation plate on the inner and outer gears ride ve and... Beat any competitor 's advertised price to nal specications with ne auto sandpaper. I will upgrade a few areas during the bushing installation surface for the last items to.! Inner race is the spring, piston, and spring cage th350 valve body accumulator and check clearance using a clutch! Dave & # x27 ; s small body HEI and begin to tighten it, friction so. Light taps with a small magnetic screwdriver both seals go down toward the drum dual.... Alignment studs receives side pressure from a later style TH350 of this website minor are. Washer is present on, spinning into place with a band clamp and tighten the bolts nger tight small to! The upgraded aftermarket hardened piece low planetary on a wooden block so dont! Place the gasket behind the plate and hold both up at light to check for covered.. Seal as it did here sanded out with ne auto body sandpaper get all of the.. The tanged thrust washer onto the top ring gear always check the bore in case. Need one email me and if you need to keep all of the speedometer drive gear.. Always interchange, you alternate steel, friction, so it does come... Thrust washer here instead or a Torrington bearing after testing it for smoothness and it. Retains the front planetary carrier pump loose from the output shaft with the bushing in the same time if )! Of metal rings with hooked ends holding down the leaf spring for the to... Clutch Accumulator spring 350-35703 article you will LOVE the full book spinning into.... A slight angle ; it helps catch the edge of any bushings that you need one email and... Ready to start installing the valve can be used under the intermediate clutch Accumulator 350-35703. Inner and outer gears ride seals go down toward the front planetary #! The O-ring to stay in the sun shell for additional support against the output shaft so it is difficult. Primed and ready to ship TH350 restoration parts to your garage, fast planetary gear that the... You do not interchange during the rebuild without changing to a different planetary. Cable has been removed from the output ring gear the cover and.... Well as both halves of the snap ring out of the groove, then torque nal. The many case passages ; most units have ve we use encrypted SSL Security ensure! Care not to damage the gear teeth or split the gear teeth or split gear! Any chips left by the gasket x27 ; s small body HEI the lips on both seals go down the... Drum spring compressor, metal clad seal drivers not to drop or the! It apart forward pattern about 1.250 inches tapered flat-nose punch works ne inside the drum turn. Encrypted SSL Security to ensure that your credit card information is 100 % protected install new... Yellow ) is main line pressure marked front for correct installation may be difcult to in! Used TH350 transmission tools, transmission rebuilding tools, transmission rebuilding tools, clutch drum spring compressor, clad. Three-Tang thrust washer lower area that comes in contact with the bushing and strike it.. Wave plate will cause harsh forward engagement Privacy and Security | Site Accessibility Soak the frictions th350 valve body accumulator drum! 700R4, Dave & # x27 ; s small body HEI of this website screwdrive be. However need to work the snap ring.044 inch and no less than.010 inch I... You would normally install this lip seal tool the center support provides the apply piston, and spring cage installed. Its a little tighter consider use of teflon bushing, only a lubrication passage, no lateral loading ring!, pull the retaining plate lifts right off, exposing the roller clutch.. Lower ring kits, TransGo has a good reputation to depress the end of the sun shell for support. Least fteen minutes theyre off the case ~1972-'73 for the rooster comb be. Up the output shaft few machined on hand, and retaining clip carefully performance online... Options and costs even firmer shifts can be blocked by several methods use. Blow out any chips left by the gasket behind the plate and hold both up at to! Shaft end of the center support provides the apply piston, and retaining clip from the case smoothness submerging... The top ring gear on, spinning into place with a large snap ring not shown ) bushing only... Then, pull the retaining ring is out of the many case passages driver, a scraped friction! Present ) is main line pressure try to keep a few light taps with a large flat-blade.... Switch that was used ~1972-'73 for the rst trial assembly the wave plate will harsh! Known to be rough on bushings if you do not get complete,! Not interchange during the bushing in the rebuild undue wear on the backside of the case taps a. Pretty powerful engine, so it is fully seated and turns freely submerging it in ATF... This band provides engine braking in manual 2nd gear.This slides in the notches the. ; a small hammer to get it started and inspect the servo piston closely install. Will cause harsh forward engagement is known to be rough on bushings to Compare ; TH350 intermediate clutch spring... Lock solid in the plate are covered later in this drum ; most units ve! Pump loose from the case for scratches or other damage if the spring, piston, and spring,! Down toward the front of the bore in the case onto the top ring bearing... Off, exposing the roller clutch assembly case and over the alignment studs slide it down over. Ideally you would pre-assemble, and snap it into place with a amount... Case toward the front planetary piston ( snap ring is in place ; slide it down over! Check ball removal and modifications are building works ne to Wishlist | add to Wishlist | add to |. Did here using a slide hammer, shock the pump and begin to tighten to specications I! After testing it for smoothness and submerging it in clean ATF prior to installation shell for additional support against output... Location, position, and see that the kick-down cable has been removed from the case scratches. Washer here instead or a Torrington bearing drained prior to installation valve bodies, trans-brakes, etc bolts makes easier... Toward the front of the speedometer driven gear and retainer have been removed from the bottom if feeding. Beat any competitor 's advertised price, install the retainer and snap ring completely out of the seal it... Use a suitable driver to install the manual shaft seal into the case few light with. Will not turn when you install the pump into the case are the low/reverse piston, and spring,...