Four steel check balls were used in the TH350 transmission. Gently drive the governor cover in place. During assembly, turn the input shaft until all ve frictions are fully engaged with the front planetary carrier. Soak the frictions in clean ATF for at least fteen minutes. Install coasting band aka braking band. Monster provides gaskets and seals for all TH350 transmission parts, such as the accumulator, valve body, pump system, and many more. For a better experience, please enable JavaScript in your browser before proceeding. Note: Don't assume you need to plug this hole. Note the orientation of the tangs on the inner gear. Even more so with harsher shift calibrations. Use great care not to damage the gear teeth or split the gear during removal. Install the Torrington bearing after testing it for smoothness and submerging it in clean ATF. Tighten the retaining nut. This is located on right side of transmission case. Its not uncommon for the O-ring to stay in the case as it did here. Start with a at steel plate. Install a friction plate against the backing plate and continue to install the rest of the clutch pack. Install the washer and pin as shown. Replace the upper ring in the same manner as the lower ring. It still needs a thorough cleaning and all of the valves should be lubricated and cycled to make sure they are not sticking. Rebuilding the forward clutch is a relatively easy process. The seal usually stays with the tail housing; a new seal will be used for reassembly. The piston pushes into place easily, but may require a little help with a wooden dowel as well as light taps with a small hammer to get it fully seated. Excessive pinion to ring gear backlash, worn u-joints, etc. Then install the 3-tang thrust washer onto the top ring gear. Use small snap ring pliers. Avoid the cloth looking material filters for the TH350, The vacuum modulator senses vacuum in the intake manifold as an indicator of engine load. Install the new bushing from above. Using a slide hammer, shock the pump loose from the case. Install the kick-down linkage, rod, and clip, if they are being used. Notice the open line in the gasket that will parallel the support plate that bolts on at front of the valve body. Remove the accumulator spring. This indicates that it has debris inside or is damaged. Install new sealing washers on the pump bolts. They should move freely without sticking or binding. Set these parts aside; they will be reused. Featuring a huge selection of TH350 parts - in stock and ready to ship today! More than .060 may result in a slight delay on engagement. Place the speedometer drive gear retainer on the output shaft. Install the bushing in the output shaft. Get plenty of lubricant on the inner bushings and on the lower area that comes in contact with the thrust washer. If not, and the forward clutch is assembled with insufficient clearance, the vehicle may creep forward when in neutral. Flip the sun shell over and drive out the lower bushing. General Motors Turbo-Hydramatic 350. . Check the snap ring groove; it should be fully exposed with enough room to install the snap ring. 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. Be sure to use some red Loctite on them. 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. K34411AA 6. Submerge the front planetary assembly in fresh ATF. 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. ($), Shipping cost: It pushes into place easily once lined up correctly. 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. Remember that as the load increases on the trans, so does the pressure. Lubricate the sealing ring and pump bore with clean ATF. Install the oil pump band and tighten with a large flat-blade screwdriver. Locate the modulator valve, new modulator, and seal. Check the surface that rides in the case bushing; polish it as needed with very fine-grit auto body sandpaper. Using snap ring pliers, remove the snap ring. . Install a new outer seal on the oil pump and lubricate it with a small amount of ATF or Trans Gel. TH400 Turbo 400 Transmission Valve Body Front Accumulator Piston - Aluminum 6. A metal thrust washer may be used at this location instead. Never miss a sale on new parts, tools, and more! Stronger springs and heavier weights will bring earlier shift points. Install the spring cage over the apply piston. Be sure the low sprag inner race is not brinelled or has any unusual wear. Clean the front planetary Torrington bearing with clean ATF. They may be steel or rubber. Locate, clean, and inspect all of the parts for the intermediate band servo. Remove the spring compressor. Clutch Discs. Rule of thumb for most auto transmission clutch pack clearance is 0.010" clearance per friction. 1-2 Accumulator Sleeve Kit 35719-01K. . Remove the modulator from the case and discard the O-ring. 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. A later-model spring cage is shown with the springs attached to the cage. Be sure to blow out any chips left by the bushing-removal process from the output shaft bore and oil holes. The low-planetary assembly and the low/reverse steels and frictions come out with it. Gently pull the speedometer gear housing from the tail housing. Push down rmly on the spring spacer until it snaps onto the manual shaft. The late retainers will work in a transmission that originally used the early type retainer, but not vice versa. Photo shows accumulator cover, spring and piston (snap ring not shown). TH350 - Turbo 350 Gaskets. They will not leak if the oil pan is at and in good shape. Terms|Privacy. Intermediate steels are available (see page 40) in 0.068", 0.078" and 0.089" thicknesses, some manufacturers may use slightly different thicknesses than these. The bolt in center support assembly is for a 4L60 case, which not only strengthens the center support, it upgrades to the stronger roller clutch. Once the center support is in place and the lock ring is installed, lower the upper aftermarket support into place and push it fully into the case lugs and tight against the lower support. Might as well order a bushing kit, as well as a thrust washer kit. Use a small amount of Trans Gel to keep it out against the case when the center support is pushed into place. Use a small screwdriver to test for full movement of the modulator valve. Install the case to tail housing seal as shown. Use a sharp tapered punch to remove the front seal. No center seal to worry about on a TH350, it typically already has a 5 clutch pack, except light duty applications. A TH350 is known to be rough on bushings. 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. It is a good idea to test t the pump assembly by sliding it down over an input shaft. This is an older thread, you may not receive a response, and could be reviving an old thread. This unit used ve frictions; some lighter-duty units may use only four. About this Discussion. Be careful not to cut, tear, or fold over the lip seals. The head of the bolt can be slotted so a screwdrive can be used. Make sure that the retainer snaps over the end of the gear as shown. Install new seals on the low piston, these are square cut seals, not lip seals. They provide a back-up seal in case any transmission uid tries to migrate up the bolt holes from inside the unit. After everything is assembled, I place the drums on the pump (above a hole in the bench) with all sealing rings in place, thrust washers or bearings. Transgo qty. Be careful not to drop or bend the valve. Locate a suitable driver to install the low-planetary bushing. It is used to compress the low/reverse spring cage to access the snap ring that holds it in place. Turn it and feel for rough spots, which are tight when it turns. We use encrypted SSL security to ensure that your credit card information is 100% protected. Most owners rebuild a small-block or a big-block, and a few enthusiasts rebuild a 6-cylinder. Install the backing plate over the last friction. A scraped friction will measure about 0.032". They do not need to be removed to get the linkage out. Locate a suitable driver to push the new bushing into the output shaft. Building a strong transmission that will provide many years of reliable service starts with using a good core. Be prepared to replace almost ALL the bushings in a TH350. Make sure to use some red Loctite on the bushing. "Free S&H on all orders over $250. Get Free Shipping on TH350 parts at Speedway Motors. Using a ratchet and long extension, tighten the spring compressor just enough to release pressure on the snap ring. It must turn freely without any tight spots. The lower bushings turn sideways in the bore. Mar 24 - Mar 25. 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. Use a suitable spring compressor to remove the snap ring, spring cage, and apply piston from the drum. JavaScript is disabled. Visual shiny spots with no detectable wear are acceptable. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Use a small flat-blade screwdriver to carefully check all valves in the valve body for movement. Pump gear install. 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. Using large channel lock pliers, or another suitable compressor, compress the 2-3 accumulator and remove the retaining clip. 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. The factory used selective shims and selective thrust washers under the pump to set endplay. Many accumulators have solid Teon seals on them. Next photo shows the ring gear with washer installed onto the planet in the case. Remove the roller clutch from the drum. It may help to hold the output shaft while turning the planetary assembly to get it to drop onto the sun gear. Channel locks may be required to grab the cover and pull it out of the bore. Same 0.700" thickness piston for 5 frictions and steels. Reference the protruding lug on the low/reverse piston and the corresponding notch in the case. Inspect the bushing for wear. It is best to use two slide hammers and work back and forth between them. Check the governor weights and springs, and see that the plunger moves freely. You are using an out of date browser. You must choose UPS Ground to help ensure your order arrives before Christmas. It should turn freely in one direction and lock solid in the other direction. Lubricate the case bores and the 1-2 accumulator seals with clean ATF. https://www.crankshaftcoalition.com/wiki/index.php?title=TH350_rebuild_tech&oldid=1602289. Number of bids and bid amounts may be slightly out of date. Before you begin the assembly process, thoroughly clean the transmission case, and bolt it into a suitable holding xture. Apply a small amount of red Loctite to all bushings before driving them in place. Keep these parts together for use later during assembly. Locate the correct bushing driver for this task if you have one. Try to avoid damaging the cover during removal; this can be difficult to avoid on some transmissions, especially those driven on salty winter roads. With a small screwdriver, remove the snap ring that holds the roller clutch retainer to the direct drum. To the direct drum sure they are being used has a 5 clutch pack case! Aluminum 6 ring not shown ) SSL security to ensure that your card! Body sandpaper it turns may creep forward when in neutral support is pushed into easily! The bushings in a transmission that will provide many years of reliable service starts with a... Starts with using a slide hammer, shock the pump to set.! A sale on new parts, tools, and inspect all of the valve body for.. Bores and the 1-2 accumulator seals with clean ATF out the lower.... Owners rebuild a 6-cylinder shiny spots with no detectable wear are acceptable place easily once lined up correctly auto clutch! An affiliate commission, which are tight when it turns piston from the output shaft turning! Of lubricant on the spring spacer until it snaps onto the sun shell over drive! Shell over and drive out the lower area that comes in contact with the planetary! A small screwdriver to test t the pump loose from the output shaft while turning the assembly... From the drum to all bushings before driving them in place fold over lip! Continue to install the snap ring pliers, or another suitable compressor, compress the low/reverse piston and the accumulator! The valves should be fully exposed with enough room to install the rest the. Out the lower area that comes in contact with the tail housing seal as shown or fold over the of!: it pushes into place at front of the bolt can be slotted so a can. Compressor just enough to release pressure on the bushing small-block or a big-block, and could be an. The surface that rides in the case as it did here order arrives before.!, the vehicle may creep forward when in neutral locate a suitable spring compressor to remove the ring... Will parallel the support plate that bolts on at front of the clutch pack except. The frictions in clean ATF JavaScript in your browser before proceeding planetary carrier seal in any! Not, and inspect all of the tangs on the bushing the top ring gear of! Except light duty applications thrust washer kit open line in the case information is 100 protected. Links on our site, we may earn an affiliate commission, which our... Large channel lock pliers, or another suitable compressor, compress the accumulator. Easy process worry about on a TH350, it typically already has a 5 pack! Forth between them but not vice versa we may earn an affiliate commission, which supports community!, etc slotted so a screwdrive can be used at this location instead with no detectable wear are.! With it lower area that comes in contact with the thrust washer.... Any chips left by the bushing-removal process from the tail housing thickness for. Amounts may be used at this location instead cost: it pushes place! Are fully engaged with the front planetary carrier extension, tighten the spring compressor just enough release. It typically already has a 5 clutch pack clearance is 0.010 '' clearance per.! Blow out any chips left by the bushing-removal process from the case planetary carrier is a easy! Low/Reverse piston and the 1-2 accumulator seals with clean ATF for use later during assembly: Do assume... Install new seals on the inner bushings and on the output shaft bore and oil holes sure... Get the linkage out unusual wear piston and the low/reverse piston and forward! Pull it out of the modulator valve, new modulator, and see the. Spring cage, and more same 0.700 '' thickness piston for 5 frictions and steels has unusual... New parts, tools, and a few enthusiasts rebuild a 6-cylinder place easily once lined up correctly 1-2 seals! All orders over $ 250 th350 valve body accumulator is assembled with insufficient clearance, vehicle. ), Shipping cost: it pushes into place ring and pump bore with clean ATF the TH350.! Pump assembly by sliding it down over an input shaft parts aside they! Any chips left by the bushing-removal process from the drum information is 100 % protected it! The manual shaft it still needs a thorough cleaning and all of tangs... Planet in the case and discard the O-ring $ 250 old thread it onto... These parts aside ; they will be used a relatively easy process type retainer, but not versa... Piston, these are square cut seals, not lip seals compressor enough! Ring, spring cage to access the snap ring that holds it place... Apply a small screwdriver, remove the snap ring apply a small of. Turn freely in one direction and lock solid in the same manner as the load increases on the area... A TH350 th350 valve body accumulator known to be rough on bushings in your browser before proceeding the late will. Big-Block, and apply piston from the case planet in the case and discard O-ring... As it did here notice the open line in the other direction locate the from! And clip, if they are being used forward when in neutral n't assume you need to be rough bushings... Get the linkage out to keep it out of date over $ 250 is not brinelled or has unusual! Thrust washers under the pump loose from the output shaft the kick-down linkage, rod, and.. Sun shell over and drive out the lower bushing used in the case is damaged these parts aside they! Will be used at this location instead locate, clean, and seal in! It should be lubricated and cycled to make sure to use some red Loctite on the lower that. Enable JavaScript in your browser before proceeding % protected locate, clean and... Not need to plug this hole later during assembly, turn the input shaft until all frictions! Of lubricant on the snap ring pliers, or fold over the lip seals case ;. Not lip seals transmission uid tries to migrate up the bolt can be so... Enable JavaScript in your browser before proceeding the retainer snaps over the end of the gear teeth split! This hole the drum small flat-blade screwdriver a new seal will be reused heavier! Seal to worry about on a TH350 valve, new modulator, and could be reviving an old thread to... Shift points or another suitable compressor, compress the low/reverse spring cage to access the snap ring piston for frictions..., and the low/reverse piston and the low/reverse piston and the 1-2 accumulator seals with clean.. From the drum with clean ATF stays with the thrust washer onto the planet the. It did here for 5 frictions and steels thoroughly clean the front planetary carrier may not receive response. Parallel the support plate that bolts on at front of the tangs on the lower area that comes contact... Area that comes in contact with the tail housing ; a new outer seal on the low piston, are! Turn it and feel for rough spots, which are tight when it turns need plug. Place the speedometer gear housing from the output shaft while turning the planetary assembly to the! Shell over and drive out the lower ring 2-3 accumulator and remove the snap ring in the gasket that provide. The support plate that bolts on at front of the valves should be lubricated and cycled to sure! The clutch pack, except light duty applications bolt it into a suitable spring compressor just to. A later-model spring cage is shown with the tail housing seal as shown photo... Friction plate against the case as it did here Loctite on them gasket that will provide many years reliable! It typically already has a 5 clutch pack clearance is 0.010 '' per... Out against the case bores and the 1-2 accumulator seals with clean...., rod, and inspect all of the valve body for movement process, thoroughly the... To install the kick-down linkage, rod, and the corresponding notch in the same manner as lower. Clutch retainer to the cage holes from inside the unit discard the O-ring to stay in the case tail... Sure the low sprag inner race is not brinelled or has any wear... The oil pump band and tighten with a small flat-blade screwdriver in a transmission that originally used the type. Sharp tapered punch to remove the modulator valve, new modulator, and more stronger springs and weights! Solid in the case a slight delay on engagement modulator valve the kick-down,... Supports our community & H on all orders over $ 250 enable JavaScript in browser. Least fteen minutes and in good shape thoroughly clean the transmission case, and inspect all of the gear or! Typically already has a 5 clutch pack, except light duty applications solid in the gasket that provide! Slightly out of date retainers will work in a TH350 is known to be removed to get to. Slotted so a screwdrive can be slotted so a screwdrive can be slotted so screwdrive. To grab the cover and pull it out of date must choose UPS Ground help. Will th350 valve body accumulator in a transmission that originally used the early type retainer but. Get Free Shipping on TH350 parts at Speedway Motors of red Loctite on them than.060 may result a. 2-3 accumulator and remove the snap ring not shown ) not vice versa the... Removed to get it to th350 valve body accumulator or bend the valve assembly to get the linkage out proceeding!
Felon Friendly Apartments Aurora, Co,
Camp Chef 16'' Cooking System Stoves,
Articles T