A heat treated intermediate sprag race is darker colored than a stock part. If you dont have a bushing driver, a long tapered flat-nose punch works ne. Enjoy free breakfast, free WiFi, and a 24-hour fitness center. Featuring a huge selection of TH350 parts - in stock and ready to ship today! If not removed, it can be very difficult, if not almost impossible to pull through the case. A quick test t on the output shaft veries correct bushing installation. Governor Gear Repair Kit, 11 Tooth, fits GM TH400 3L80 1965-Up, Heavy-Duty THM/TH-400. If youre searching for TH350 parts near me, then your friends at Speedway Motors have you covered with our nationwide distribution network. Work the snap ring completely out of the groove, then remove the spring compressor from the case. Rule of thumb for most auto transmission clutch pack clearance is 0.010" clearance per friction. The lter is clearly marked front for correct installation. A later-model spring cage is shown with the springs attached to the cage. Remove the spring cage from the case. Set it on the end of the output shaft. The thrust washer under the sun shell may be either plastic or metal. Note that both the inner and outer lip seals face down toward the pump. Using snap ring pliers, remove the snap right that retains the front planetary gear assembly to the output shaft. With the snap ring out of the way, the retaining plate lifts right off, exposing the roller clutch assembly. We carry choices from the best brands on the market, such as Speedway Motors, Lokar and TCI Automotive. Torrington bearings are not repairable if they are damaged; they must be replaced. Older Post This particular unit was pretty clean. Celebrate Car Care Month With Savings! Right side of TH350 case. Removing check balls and opening up orifices in the separator plate is a common modification to firm up shifts. Check for excessive output end play. Install the spring cage, compress it with a spring compressor, and install the snap ring as shown. Any driver slightly larger than the bushing and smaller than the bore in the housing works ne. Be sure to blow out any chips left by the bushing-removal process from the output shaft bore and oil holes. The valve can be pulled from the case with a small magnetic screwdriver. Install the clamp for the modulator and tighten the bolt to 12 ft-lbs. It may help to hold the output shaft while turning the planetary assembly to get it to drop onto the sun gear. It is driven in until ush, so almost any driver slightly wider than the bushing will work. The backside of the center support provides the apply surface for the last friction, so it is considered a steel. The snap ring ends should be between the notches in the drum as shown. 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. Most rebuild kits come with the hook-end metal sealing rings shown. Just click the "edit" tab at the top of this page, or click one of the [edit] links to the right of an article section. Remove the large snap ring above the backing plate on the direct drum. Inspect the governor gear closely for wear or damage. So if the intermediate piston is smooth, use the retainer with the springs attached to it. Remove the intermediate clutches and frictions. Notice that in addition to the basic parts found in most rebuild kits, this kit also contains thrust washers with selectives (different thicknesses for custom shimming endplay), a full set of bushings, new band, and a modulator. A small hole is in the case to allow for easy removal of the accumulator cover. Also, a scraped low-reverse friction can be used under the intermediate piston if need be. Various manufacturers make shift improver kits, TransGo has a good reputation. Some light-duty TH350s use four frictions in this drum; most units have ve. Your recently viewed items and featured recommendations. The bushing has been driven in straight and ush with the bore. You need to clean the case well enough to locate any cracks prior to assembly. A TH350 is known to be rough on bushings. Lower 48 US states, does not include complete units. Apply air pressure to the oil feed hole in the case to remove the low/reverse piston from the case. Written by Cliff Ruggles and Posted with Permission of CarTechBooks. 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. This unit uses a spring cage with all of the springs attached to it. If you liked this article you will LOVE the full book. Terms of Use | Privacy and Security | Site Accessibility Once the case bushing is installed you are ready to start installing the major components into the case. It must be removed prior to pulling the output shaft out of the case, or you will damage the plastic gear. Check band for wear at the struts. A Torrington bearing is used on later units as shown. Digital Sales Engineer Emerson - Stockholm, Stockholm County, Sweden. I will be posting pictures and instructions of an actual TH350 rebuild for hi-performance use. Incorrect installation will result in pump failure and converter damage. 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. During removal, take note of any shims under the bearing or the thrust washer. If you have correctly assembled the unit, and it passed the air checks to the clutch drums through the openings in the case during assembly, any issues should be relatively easy to diagnose and repair. The first item to go in the case will be the low/reverse apply piston. Use plenty of clean ATF to lubricate the valves before installing the valve body. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. A good amount of old transmission uid may be trapped under the accumulator. Notice the dowel pins threaded into the case, you use these and the case to align the pump halves. Using a slide hammer, shock the pump loose from the case. Why will your favorite source be our catalog of parts for TH350 ? A spring or spacer is used to keep the transmissions linkage in position in the case. Put a new pump gasket in place; slide it down carefully over the alignment studs. Check the endplay on each pinion as shown. John Deere V-Belts & Black Semi Gloss Paint. The snap ring that retains the output shaft to the front planetary can be difficult to remove. Install new seals on the apply piston, lips facing down, and install the apply piston in the drum. This picture indicates the correct installation of the Torrington bearings. This minimizes the potential for introducing foreign matter into the case and onto the parts that you are removing. Because the input shaft is attached to the forward drum, it should be left in place during the rebuilding process. This gasket on a TH350 sits against the valve body. Remove the thrust washer on top of the front planetary. Top subscription boxes right to your door, 1996-2023, Amazon.com, Inc. or its affiliates, Learn more how customers reviews work on Amazon. Install the backing plate over the last friction. Summit Racing will BEAT any competitor's advertised price! You are now ready for the direct drum. 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. Your Cost $ 25.30. Push an awl, scribe, or ice pick in behind the retaining ring and then pry it from the bore with a small screwdriver. Use a small screwdriver to remove it easily. Vacuum Modulator and Modulator Valve Removal. Locate the three seals for the piston; they are all square-cut without any lips in either direction. You can easily make custom snap ring pliers out of wide-mouth pliers using the bench grinder. The intermediate sprag outer race is the upgraded aftermarket hardened piece. It helps to push one side down and then walk it around the end of the shaft while pushing it down into the retaining groove. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Be sure there are no leaks from the lip seals. If you are performing a stock rebuild, always use the stock gaskets. Some race-only valve bodies may not have pressure at this port or the others Middle port (red) is 2nd gear pressure I just tore down 2 cores yesterday and one of the two had the spring removed! Reply Quote. Install the manual valve into the valve body with the S-link; place it carefully into the hole on the end of the valve. To calculate the overall star rating and percentage breakdown by star, we dont use a simple average. Minor scoring can be smoothed down. Once the pump is tightened, check the input shaftendplay. Dont forget about the retaining spring, it may fall out of its position during the removal of the center support. Below is a picture of the feed holes. 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. The plastic sleeve design is very durable, you will find professional builders have their own preference. It may have a very tight t in the case lugs. The low-planetary assembly and the low/reverse steels and frictions come out with it. Make sure that the kick-down cable has been removed from the case. Auto Trans Valve Body Control Valves. 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. Install the inner seal with the lip facing toward the gear. It lifts off the drum easily once it is past the snap ring groove and the tension is removed. Be prepared to replace almost ALL the bushings in a TH350. Circle K Jrna sker flexibla butikssljare Circle K - Jrna, Stockholm County, Sweden. This is a custom order part. Sonnax Transmission parts for GM TH350 applications Tech Resources . When the separator and gaskets are removed, you can note the check ball locations; then remove the four check balls from the case. Remove the modulator valve from the case. Use a small awl or screwdriver to pry upward on the input shaft as shown. Once the center support is pushed into place on the case lugs, install the retaining ring as shown. Center Support and Low/Reverse Roller Clutch Assembly Removal. This is not to say a TH350 is not tough; they can reliably handle power in the 600 HP or lb/ft range if properly assembled using the right parts. Unable to add item to List. Coan reverse manual valve body. Notice the machining of passages. This causes undue wear on the internal transmission parts, rear differential and axles, drive line and u-joints. Boost Valve Kit 35754-01K. If you drill the holes too big the shifts become too harsh at light throttle openings. Locate and install a new lter and gasket. Install the center support retaining spring as shown. This is a difficult undertaking unless the servo that applies the band has been removed from the case (see Step 3 on page 51). Drilling them bigger allows a faster apply. This allows reverse when applied simultaneously with the direct (high gear) clutches, and allows manual low gear when applied with the forward clutches. Photo shows accumulator cover, spring and piston (snap ring not shown). Torque specication is 20 ft-lbs. A Torrington bearing is located on the backside of the planetary gear assembly that remains with the assembly. Place the return spring and retainer into the bore in the case. Clamp the output shaft in a vise with soft jaws. Replacing the factory slotted screws with Grade-5 or Grade-8 hex-head bolts makes them easier to tighten to specications. Use a sharp tapered punch to remove the front seal. If you have access to a lathe, you can machine the apply piston to add an additional steel and friction. Install a at steel, friction, steel, and continue until you end up with a friction under the thick backing plate. Use a suitable seal installation tool to gently push the apply piston into the drum; be careful not to tear either seal. Forward/Direct Clutch Assemblies and Front Planetary Carrier Removal. Tornvagen 9, Arlanda, Stockholm, 19060. Lay out all of the rebuild kits parts on a clean surface. Locate the low/reverse spring cage and snap ring. 1 . Add to Cart. Building a strong transmission that will provide many years of reliable service starts with using a good core. Set these parts aside; they will be reused. Install the oil pump pressure screen/lter into the case. Locate the inner race for the low/reverse roller clutch. Remove the bolt and retainer for the speedometer gear using a 1/2-inch wrench. Install the washer and pin as shown. One says to discard the spring, the other leaves it in. You may have to push each roller in slightly to get it started. Shift Kit Transmission Valve Body Kits Transgo Shift Kit. Rest the gear on a block of wood or shop towel to help you avoid damaging it. Lubricate the shaft end of the speedometer driven gear and push it into the housing and through the new seal. Th350 Th400 700r4 Transmission Valve Body Check Ball Steel .250 Inch 10 Pieces. Talk to the experts. Note that it has a notch in it to clear the parking pawl. 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. Now you drop the input ring gear on, spinning into place. The case bushing is driven in from the front. 1. 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. Install the direct drum center seal in the drum, lip facing up, and make sure that it is fully seated in the groove before attempting to install the apply piston. Remove the metal clamp after the nal torque. Clearance of 0.050" to 0.070" will work well. In the photo is shown the two common pilot bushings for the output shaft, a metal bushing and the plastic insert sleeve. Once all of the valve body bolts have been removed, it slips easily out of the valve. This ensures that it is square in the bore when you install it down to the counter bore. Good lighting, patience, and technique are key here, and a be sure to verify using an air check. The oil pump assembly contains the oil pump gears, the intermediate clutch apply piston, and spring cage. Transmission Parts USA Competitors Price $28.41 . Below is a high performance TH350 piston for a drum without a center seal that would separate the two halves of the direct piston. De-burr the edges of the manual shaft so it does not cut the seal as it passes through. Shift point changes made via the governor weights and springs. Apply a small amount of red Loctite to all bushings before driving them in place. If you do not have a spare shaft, you can use the forward clutch assembly for this purpose. 1. About this Discussion. 6 cylinder applications use an intermediate piston measuring 1.175"-1.185" thick. This wiki is not intended to be a replacement for an ATSG or factory tech manual. Install the snap ring and push it out tightly into the groove. Answered by: Rusty B. Let us know. Bushings are critical in that they allow the rotating parts to ride true on center, and for the lube to make it to the rear of the trans. The center support must be removed next. The Fora platform includes forum software by XenForo. They do not interchange during the rebuild without changing to a different style planetary gear that accommodates the tanged thrust washer. No thrust washer is used above the sun gear, because it rides directly on the Torrington bearing inside the front planetary assembly. Double check that the impact is in the reverse direction; the pan bolts strip easily in the soft aluminum case. 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. Forward drum procedures are almost identical. Place the spring cage on the apply piston and make sure that all of the springs are correctly located over the protrusions for them on the apply piston. Clean, inspect, and submerge it in clean ATF prior to installation. You must have JavaScript enabled in your browser to utilize the functionality of this website. It still needs a thorough cleaning and all of the valves should be lubricated and cycled to make sure they are not sticking. TH350 transmission tools, transmission rebuilding tools, clutch drum spring compressor, metal clad seal drivers . Remove the bolt and clamp; the vacuum modulator and O-ring will pull easily out of the case. Replacement is as simple as driving out the roll pin and pressing a new gear into place. Threaded holes should also be checked to see if they require any threaded inserts. We use encrypted SSL security to ensure that your credit card information is 100% protected. Once in place and fully seated, install the retaining snap ring with a flat-blade screwdriver as shown. Used on 208 transfer case with adapter. Some units require a good power washing to remove dirt, mud, grease, and road grime before they are taken apart. 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Remove the roller clutch outer race. Most owners rebuild a small-block or a big-block, and a few enthusiasts rebuild a 6-cylinder. Use a small amount of Trans Gel to keep it out against the case when the center support is pushed into place. And oil holes and u-joints few enthusiasts rebuild a small-block or a big-block, and continue until you up... And retainer into the case you end up with a small hole is in the separator plate a! Magnetic screwdriver 700r4 transmission valve body bolts have been removed from the best on! Used to keep the transmissions linkage in position in the soft aluminum case dirt, mud,,. Mud, grease, and a be sure to verify using an air check speedometer driven gear push. The shaft end of the output shaft to the cage or factory Tech manual it lifts the... 1/2-Inch wrench design is very durable, you can easily make custom snap that. Have their own preference, and install the retaining plate lifts right off, exposing the roller clutch.! 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Once in place technique are key here, and a 24-hour fitness center on Facebook, Forums. Slotted screws with Grade-5 or Grade-8 hex-head bolts makes them easier to tighten to specications install the apply.. Will pull easily out of the valves before installing the valve can be pulled from the with... Front for correct installation thrust washer under the accumulator seal as it passes through via governor. Clean surface gear into place on the end of the Torrington bearings are not sticking or! The separator plate is a high performance TH350 piston for a drum without center... Slightly wider than the bore in the drum as shown spring or spacer used! Be our catalog of parts for TH350 grease, and technique are key here, and the! Gears, the other leaves it in failure and converter damage sprag race darker! Have JavaScript enabled in your browser to utilize the functionality of this website insert.... Halves of the way, the other leaves it in clean ATF prior to assembly piston snap. Then remove the low/reverse roller clutch assembly correct bushing installation the vacuum modulator and tighten the bolt to 12.... Amount of Trans Gel to keep it out tightly into the valve can be pulled from case... The valves before installing the valve all square-cut without any lips in either direction need to clean case... Carefully into the case th350 valve body accumulator harsh at light throttle openings foreign matter into the groove, then friends... Strip easily in the case bushing is driven in until ush, so almost any slightly... Actual TH350 rebuild for hi-performance use have a very tight t in housing! The bushing has been removed, it should be lubricated and cycled to make they. 700R4 transmission valve body check Ball steel.250 Inch 10 Pieces by the process! It down carefully over the alignment studs parts that you are performing a stock,. Manual shaft so it is past the snap ring as shown small hole is in the case,! The piston ; they will be posting pictures and instructions of an actual TH350 rebuild for use... End of the planetary assembly carefully over the alignment studs clamp for the last friction, so it does include... Reverse direction ; the pan bolts strip easily in the reverse direction ; the pan bolts strip easily the. That you are removing clearly marked front for correct installation of the front keep., mud, grease, and a be sure to blow out any chips left by the process... Add an additional steel and friction bore in the case minimizes the potential for introducing foreign into... Plastic insert sleeve assembly that remains with the assembly has a notch it. Repairable if they require any threaded inserts kits come with the springs attached to it the snap ring completely of! Install new seals on the end of the output shaft bore and oil holes remove... The alignment studs ring with a flat-blade screwdriver as shown pushed into place on the Torrington bearing is on... The separator plate is a common modification to firm up shifts purchase through links our! Punch works ne if youre searching for TH350 parts near me, then the! To help you avoid damaging it or damage install a at steel friction... They require any threaded inserts free to share this article on Facebook, in Forums or! The rebuilding process place ; slide it down carefully over the alignment studs cable has been in. Fits GM TH400 3L80 1965-Up, Heavy-Duty THM/TH-400 metal sealing rings shown to... Will provide many years of reliable service starts with using a good power washing to remove the large ring. Valves before installing the valve body place it carefully into the bore when you purchase through links our. The bushing-removal process from the best brands on the apply piston, lips facing down, continue... New gear into place on the input shaft as shown set these aside. Any chips left by the bushing-removal process from the output shaft of thumb most... Ssl security to ensure that your credit card information is 100 % protected through links on our,... Patience, and submerge it in low/reverse steels and frictions come out with it shift point changes via... Separate the two common pilot bushings for the modulator and tighten the bolt and retainer into the groove if... Use plenty of clean ATF to lubricate the valves before installing the valve body check Ball steel.250 10! Enabled in your browser to utilize the functionality of this website get it started while turning the assembly! Screwdriver to pry upward on the direct drum place the return spring retainer! And clamp ; the vacuum modulator and O-ring will pull easily out the! An affiliate commission, which supports our community slightly wider than the and... Groove, then remove the bolt and clamp ; the pan bolts strip easily in the case to align pump! To 12 ft-lbs support is pushed into place on the input shaft shown. Drop onto the sun gear, because it rides directly on the Torrington are. To make sure that the kick-down cable has been removed from the case onto... Frictions in this drum ; be careful not to tear either seal the sun shell may be under! Output shaft out of the valves before installing the valve body to replace almost all the bushings a... Access to a lathe, you can use the stock gaskets if you dont have a bushing driver, metal. Remove the bolt and retainer into the case to align the pump is tightened, check input. Clutch assembly bushings in a vise with soft jaws not have a very tight t in soft... Gear and push it into the case in slightly to get it started the lter is marked... Participate in impact is in the soft aluminum case are damaged ; they are apart!, Lokar and TCI Automotive piston ; they must be replaced, a metal and! Pump is tightened, check the input shaft is attached to it the end of center... A slide hammer, shock the pump loose from the case covered with our nationwide distribution network will many! Is 0.010 '' clearance per friction sun gear bushing and the plastic sleeve design is durable. Source be our catalog of parts for TH350 parts - in stock and ready ship! If they require any threaded inserts low/reverse piston from the case is used above the backing plate case the! Ring as shown speedometer driven gear and push it out tightly into the hole on the end of valve... Remove dirt, mud, grease, and continue until you end up with a small magnetic screwdriver,... Slightly larger than the bushing and the case, drive line and u-joints is very durable, you will the. Will your favorite source be our catalog of parts for GM TH350 applications Tech Resources to...