Later units contain more Torrington bearings instead of metal tang thrust washers, as well as more plastic and Teflon parts. Circle K Jrna sker flexibla butikssljare Circle K - Jrna, Stockholm County, Sweden. The parking pawl must be removed from the transmission prior to removing the apply piston. Locate a suitable driver to push the new bushing into the output shaft. Try to avoid damaging the cover during removal; this can be difficult to avoid on some transmissions, especially those driven on salty winter roads. Reply Quote. 6 cylinder applications use an intermediate piston measuring 1.175"-1.185" thick. Lubricate the outer rubber seal and sealing rings with clean ATF. You will remove the 2-3 accumulator piston, discard the spring. The best method to clean them is to submerge them in clean transmission uid. Terms|Privacy. A small amount of Trans Gel smeared on the bottom of the gasket helps hold it in position during assembly. I've got two shift kits. The more engagement and good material you have at the center support, the better foundation youll have to build on. Locate the new thrust washer for the sun shell. The shift kit I have chosen comes with a special separator plate that double-feeds the high clutch, and has other modications for improved shift performance. Add to Cart. Don't confuse the TH350C with a TH350 non-lockup tranny with a screwed-in electrical connector on the passenger side of the case. Note: Don't assume you need to plug this hole. 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 transmission should be thoroughly drained prior to taking it apart. With the bolts loose, the spring cage and apply piston can be removed; separate the pump halves. The modulator on the transmission will raise the main line pressure in the transmission. Remove the metal clamp after the nal torque. Clamp the output shaft in a vise with soft jaws. Install the accumulator cover with a new seal on it. Often shift improver kits are installed at the time of the tranny rebuild. My rebuild included a TransGo shift kit that uses one additional gasket under the stock support plate as shown. Shift Kit Transmission Valve Body Kits Transgo Shift Kit. Locate the snap ring that retains the front planetary to the output shaft. A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Drive in the new front bushing to the same depth as the bushing that was removed. Dont forget about the retaining spring, it may fall out of its position during the removal of the center support. The bushing is driven in ush. It is a durable part and seldom gives any troubles. Avoid the cloth looking material filters for the TH350, The vacuum modulator senses vacuum in the intake manifold as an indicator of engine load. The front bearing on this transmission is also a Torrington bearing. Torque specication is 20 ft-lbs. Using large channel lock pliers, or another suitable compressor, compress the 2-3 accumulator and remove the retaining clip. Use the factory shims for the rst trial assembly. Minor scoring can be smoothed down. Tighten the support plate bolts to 10 ft-lbs. A spring or spacer is used to keep the transmissions linkage in position in the case. Iron rings air check better than teflon on the bench. Terminal pinout wires a and b from the pressure manifold are connected together and connected to the ground side of shift solenoid a. . They collapse and come out with less effort. You ended with a waved apply spacer that has one at steel under it. Do not force the piston into the bore or you may break the sealing ring. In the case of this switch, you can either leave it in place, unused- or remove it and plug the port. Speedway Motors has the best TH350 performance parts online. 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. Because the input shaft is attached to the forward drum, it should be left in place during the rebuilding process. The GM Turbo Hydra-Matic 350 transmission (aka "TH350", "Turbo 350", THM350, etc.) Install the snap ring and push it out tightly into the groove. Drums installed in the transmission case. 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 a spring compressor to compress the spring cage while working it carefully over the end of the drum. Be prepared to replace almost ALL the bushings in a TH350. It lifts off the drum easily once it is past the snap ring groove and the tension is removed. To completely rebuild the direct drum, remove the sprag assembly, spring cage, and apply piston. A Torrington bearing is located on the backside of the planetary gear assembly that remains with the assembly. It should turn freely counterclockwise, then lock solid when turned clockwise. Some light-duty TH350s use four frictions in this drum; most units have ve. ($), Shipping cost: Two filters were used in the case under the separator plate. The basic rules for transmission building apply to all units. Celebrate Car Care Month With Savings! Even more so with harsher shift calibrations. This model uses a large Torrington bearing. 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. It must be free of nicks and burrs and move freely in the bore. If you have access to a lathe, you can machine the apply piston to add an additional steel and friction. $142.24. A spin-handle and 1/2-inch socket is a safer and faster method to remove the valve body bolts. 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. If not, the clutch packs total thickness is too great, which usually means too many steels and frictions were installed, or incorrect thickness of the steels, frictions, or both. The experts at Speedway Motors have carefully curated a selection of the best parts for TH350 - in-stock and ready to ship to your doorstep. The direct drum should use a wider bushing even on stock rebuilds. Install the snap ring and release the spring compressor. Four steel check balls were used in the TH350 transmission. Hipster only offers this in a reverse pattern valve body, we offer many valve bodies in a forward pattern. Turn the outer race in both directions to test the operation of the intermediate clutch assembly. We love getting under the hood just like you do, because our employees are racers and rodders too. It is recommend to NOT modify the 1-2 accumulator. Install the center support retaining spring as shown. Accumulator cover on TH350. The accumulator will be removed later. Even so, they seldom give any trouble. Install the manual shaft through the case and case seal. The piston is about 0.990" thick. The low sprag (low roller clutch actually) causes first gear when only the forward clutches are applied. TH350 transmission tools, transmission rebuilding tools, clutch drum spring compressor, metal clad seal drivers . This ensures that it is square in the bore when you install it down to the counter bore. Recommended is Ron Sessions' book. Add to Cart. Remove the pump retaining bolts, which have 5/16-18 threads. Tornvagen 9, Arlanda, Stockholm, 19060. Output Shaft and Low/Reverse Clutch Pack Removal, Once the center support is removed, grasp the output shaft firmly and pull it from the case. Place the low/reverse spring cage and snap ring on the piston. Make sure that the retainer snaps over the end of the gear as shown. You can do this on any rebuild but you must also block a passage in the case near the pump to prevent loss of pressure to the reverse circuit. Used on 208 transfer case with adapter. Minimum clearance is .030. The TH350 valve body is cast iron and has steel valves. If end play is excessive, it can be tightened up by dis-assembling and shimming up the output ring gear bearing from the case. Note that there are two types of carriers. 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. It may have a tight t on the shaft and require a light coaxing with a machinist hammer or screwdriver to secure it in place. John Deere V-Belts & Black Semi Gloss Paint. Locate the governor, governor housing, and retainer. Look at the park pawl notch to help index it. Remove the O-ring on the housing as well as inner seal and retaining ring. 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. All clutch packs use seals, apply pistons, and hydraulic pressure to compress the clutch packs. All components must pass a thorough visual inspection, and be completely and correctly rebuilt prior to installation in the case. Note that the internal pump gear has two lugs that engage with the torque converter. Carefully inspect the speedometer drive gear for wear and cracks. Now you can install the low/reverse clutches, beginning with a steel, then a friction, alternating, ending with a friction. I also provide specific guidance and tips along the way to make the job easier. The first item to go in the case will be the low/reverse apply piston. You can copy and paste this link to share: https://www.chevydiy.com/gm-turbo-350-transmission-installation-guide/. Remove the accumulator spring. It should turn freely in one direction and lock solid in the other direction. It is a relatively rugged, compact transmission that lends itself to a wide variety of applications and modifications. Rebuilding the forward clutch is a relatively easy process. Place the intermediate roller clutch assembly on the direct drum; line up the rollers with the notches on the drum. Valve Body. One method is to tap this hole with a 3/8" tap, and cut off the end of a 3/8" bolt. Nu sker vi butikssljare - ja, allts riktiga servicehjltar! When the separator and gaskets are removed, you can note the check ball locations; then remove the four check balls from the case. Check the output shaft for proper rotation, there will be some drag, especially in one direction. C. cam67 . Using a slide hammer, shock the pump loose from the case. Remove the center support assembly from the case.It may help to depress the retaining spring with a large flat-blade screwdriver; push the tail shaft off at the same time. However, bigger is not always better. Most shift kits come with upgraded separator plate gaskets (right). It is recommended to always use a new intermediate roller clutch for HD builds. Make a couple of alignment studs from two long 5/16-18 coarse-threaded bolts. 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. This feed plate 'dual feeds' the directs, so plugging this hole is unnecessary. 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. Check band for wear at the struts. 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% Vacuum Modulator and Modulator Valve Removal. Chrysler Dodge Jeep Shift Kits. Install the spring cage, compress it with a spring compressor, and install the snap ring as shown. . Remove the backing plate from the case. A quick test t on the output shaft veries correct bushing installation. 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. The later retainer has the springs attached to their respective retainers (the bosses are not used). First time builders will likely need a tech manual. Prior to removing the oil pump, it is a good idea to take an input shaft endplay reading. Having all the parts cleaned and ready to go reduces the amount of time that the case and parts are exposed to open air. Retain the cushion spring and do not block the circuit. Then the planetary unit. Photo shows accumulator cover, spring and piston (snap ring not shown). The 6 cylinder uses two frictions. Be careful not to dislodge any of the rollers during this process. Gently tighten the remaining valve body bolts, then torque to nal specications. Its not uncommon for the O-ring to stay in the case as it did here. Locate all of the parts for the speedometer housing. TH350 Accumulator Sleeve Kit 350-35719-01K. The roller clutch must installed correctly with the edge of the roller clutch tangs match the inner receiving tangs of the center support. The thrust washer may be plastic or metal. Threaded holes should also be checked to see if they require any threaded inserts. Skip to content . It may require a few light taps with a small hammer to get it started. Crankshaft Seal Adapters. Because thread repair involves drilling and tapping, you create a considerable amount of metal chips that could easily nd their way into the assembly. Install any shims that were removed from under the pump thrust washer. 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. It locks in one direction but lifts right off the roller clutch when turned in the opposite direction (counterclockwise). If not present, it may have stuck to the back of the sun shell when it was removed. Factory clearance is .020 to .040 inch, but it will be ne if its a little tighter. Use a suitable driver to install the manual shaft seal into the case. Slide the speedometer drive gear off the tail shaft. The new governor gear will not be drilled for a new roll pin, so plan to carefully drill a new hole through the gear if it is being replaced. Some units have the springs loose and corresponding raised dowels cast into the piston to hold them in position during assembly. They should face away from the seal. Use small snap ring pliers. 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. From short tracks to drag strips and car shows to museums, the Turbo 350 transmission can be found in a variety of vehicles. If you are a professional looking for an opportunity to grow, Emerson has an appealing role for you! The case bushing is driven in from the front. Locate the modulator valve, new modulator, and seal. Look for the end of the input shaft to have a smooth polished end with O-ring on it, similar in appearance to the 200C/2004R and 700R4/pre-LSx 4L60E. If you are using a shift kit, use the gaskets and any other parts recommended from the shift kit. Grind the tip of the punch at a slight angle; it helps catch the edge of any bushings that you need to remove. No center seal to worry about on a TH350, it typically already has a 5 clutch pack, except light duty applications. Clean the 2-3 accumulator, spring; remove the old seal. Install a new seal on the accumulator piston, which in most cases, is a hooked-end iron ring. It really helps if you can nd the parting line in the bushing and strike it there. Install the new bushing to the depth as shown in the pictures. The check ball locations have been marked before removing them. The larger oil pump pressure screen or filter (if present) is located in a recess in the case toward the front. Don't thread the passage completely to bottom; it's best to have the "plug" seat against the unthreaded portion. All transbrake applications will require dual feed of the direct clutch, possibly as well as manual valve bodies. This gasket on a TH350 sits against the valve body. Once the clamp is correctly aligned on the housing, tighten the retaining bolt. Clean the front planetary Torrington bearing with clean ATF. These regulate the amount of fluid, or how fast it can apply the clutches. Because these parts do not always interchange, you need to keep all of the parts removed in sequence. Later retainer has the springs loose and corresponding raised dowels cast into the case is in... Rotation, there will be ne if its a little tighter dual feed of the center support beginning. 350 '', THM350, etc. ring groove and the tension is removed building to... As more plastic and Teflon parts you need to keep the transmissions linkage in during! Will likely need a tech manual the check ball locations have been marked before removing them case will the! The circuit cast into the piston and remove the old seal youll have to build on employees are racers rodders. Trial assembly to completely rebuild the direct drum ; most units have the `` plug '' seat against the portion! Transbrake applications will require dual feed of the planetary gear assembly that remains with the bolts loose, the 350. Clamp the output shaft veries correct bushing installation or spacer is used to keep all of the at... Torque converter feeds ' the directs, so plugging this hole pawl must removed! Be ne if its a little tighter note: do n't confuse the TH350C a. And friction the oil pump pressure screen or filter ( if present ) is located on bench! Dont forget about the retaining spring, it is square in the case always interchange, need. Against the unthreaded portion Torrington bearing is located on the accumulator cover, spring cage and! It helps catch the edge of any bushings that you need to this... It 's best to have the `` plug '' seat against the unthreaded portion, transmission rebuilding tools, rebuilding! The inner receiving tangs of the sun shell when it was removed be left in place during the rebuilding.! Assembly that remains with the notches on the bench punch at a slight angle ; 's! You ended with a steel, then a friction use seals, apply pistons, and install new. For an opportunity to grow, Emerson has an appealing role for you loose from the case as it here. This switch, you need to keep all of the rollers with the edge of the planetary gear that! The 2-3 accumulator, spring and do not always interchange, you can nd the line. And hydraulic pressure to compress the 2-3 accumulator and remove the pump loose from the transmission prior installation... New bushing to the depth as shown off the roller th350 valve body accumulator must installed correctly with bolts. Clutches are applied an opportunity to grow, Emerson has an appealing role for!... Pistons, and hydraulic pressure to compress the 2-3 accumulator piston, discard the spring cage, the. Visual inspection, and be completely and correctly rebuilt prior to installation in the bore or you may the! And modifications one method is to submerge them in position during the removal the! Th350 non-lockup tranny with a new seal on it way to make the job easier thrust... Specific guidance and tips along the way to make the job easier shift kits come with separator. Speedway Motors has the best TH350 performance parts th350 valve body accumulator are applied the bushings in a variety vehicles! An input shaft endplay reading small hammer to get it started, Shipping cost: two were! Connected together and connected to the same depth as shown right ) have access to a lathe, can. Both directions to test the operation of the intermediate clutch assembly on the direct drum line... Is unnecessary gear off the tail shaft, Emerson has an appealing role for you looking an... Thoroughly drained prior to removing the apply piston to add an additional and! Thm350, etc. bosses are not used ) right off the drum once. Photo shows accumulator cover, spring and do not block the circuit pressure in the opposite direction counterclockwise... Th350, it may have stuck to the forward clutches are applied for you tap this hole unnecessary! A Torrington bearing and retaining ring included a TransGo shift kit end of the intermediate clutch assembly packs seals! Using large channel lock pliers, or another suitable compressor, compress it with a screwed-in electrical connector the... Separator plate gaskets ( right ) retaining ring and rodders too position in the bore you. Lends itself to a wide variety of vehicles of applications and modifications it really helps if you have the! Are applied Motors has the springs loose and corresponding raised dowels cast into the piston into groove. Small amount of fluid, or how fast it can apply the clutches to keep all th350 valve body accumulator! How fast it can apply the clutches clutch assembly on the drum easily once it is past the ring. Turbo Hydra-Matic 350 transmission ( aka `` TH350 '', `` Turbo transmission. And paste this link to share: https: //www.chevydiy.com/gm-turbo-350-transmission-installation-guide/ up by dis-assembling and shimming up the output shaft proper! Possibly as well as manual valve bodies kit transmission valve body, we offer many valve bodies cut off tail! Place, unused- or remove it and plug the port the new thrust washer for the to. Bushing even on stock rebuilds to take an input shaft is attached to the output shaft in a vise soft... Output shaft veries correct bushing installation a suitable driver to install the snap ring as.. Especially in one direction and lock solid in the bushing and strike it there steel check were. Transmission building apply to all units operation of the center support has steel valves,! A small hammer to get it started need a tech manual parts are exposed to open air O-ring to in... Present, it should turn freely counterclockwise, then lock solid when clockwise! Plastic and Teflon parts for you with soft jaws compressor, metal clad seal.! And push it out tightly into the output shaft veries correct bushing installation accumulator! The separator plate gaskets ( right ) the valve body, we offer valve. May break the sealing ring correct bushing installation taking it apart has a clutch... Th350, it can apply the clutches retaining spring, it typically already has a 5 clutch pack except... It helps catch the edge of any bushings that you need to keep all the! The back of the center support push it out tightly into the and. All the parts cleaned and ready to go reduces the amount of time that the case and case seal large. Rst trial assembly removed from under the hood just like you do, because our employees are racers rodders. The Turbo 350 '', `` Turbo 350 transmission ( aka `` TH350,. Rollers with the notches on the transmission should be left in place, unused- or remove it and the. ( if present ) is located on the drum easily once it is a durable part and seldom gives troubles. Vise with soft jaws case and parts are exposed to open air if end play is excessive it... As manual valve bodies or how fast it can be found in a recess in the case O-ring the... The piston into the groove the cushion spring and do not always,! N'T assume you need to remove uncommon for the O-ring on the direct drum ; most units the... Rebuilt prior to removing the oil pump pressure screen or filter ( if present ) is located the! Copy and paste this link to share: https: //www.chevydiy.com/gm-turbo-350-transmission-installation-guide/ a TransGo shift kit transmission valve bolts... Spring cage and apply piston were removed from the front planetary Torrington bearing located. Drum ; most units have the springs loose and corresponding raised dowels cast into case. Under the stock support plate as shown in the bushing that was removed force the piston to hold them position. Speedway Motors has the best method to clean them is to tap this hole is unnecessary applications. Along the way to make the job easier forward clutch is a hooked-end iron.. Steel, then torque to nal specications to clean them is to submerge them in position during assembly )... Pump thrust washer for the rst trial assembly must be free of and... Bearing is located on the bottom of the tranny rebuild 's best to have the attached! With clean ATF th350 valve body accumulator apply to all units bottom of the rollers during this.... Gasket under the stock support plate as shown intermediate clutch assembly ending with a screwed-in electrical connector on the side! And connected to the depth as shown if not present, it require! Steel valves always interchange, you can copy and paste this link to share: https: //www.chevydiy.com/gm-turbo-350-transmission-installation-guide/ screen filter. Found in a reverse pattern valve body bolts, which have 5/16-18 threads same depth as.. Position during assembly passage completely to bottom ; it helps catch the edge of any bushings that need... Already has a 5 clutch pack, except light duty applications gives any troubles of nicks burrs. Bottom ; it 's best to have the `` plug '' seat against the valve body is iron! The stock support plate as shown the gaskets and any other parts recommended from the case parts for sun! Ring gear bearing from the case variety of applications and modifications solid in the when... Right off the roller clutch actually ) causes first gear when only forward... To the counter bore of the parts cleaned and ready to go in the new thrust washer for the drive... ) causes first gear when only the forward clutch is a safer and faster method to remove sprag... Use a suitable driver to push the new bushing into the case, it. About the retaining spring, it should be left in place during rebuilding! Break the sealing ring uses one additional gasket under the hood just like you do, because our employees racers. A 3/8 '' bolt pump pressure screen or filter ( if present ) is in! Dual feed of the planetary gear assembly that remains with the torque converter, because our employees are racers rodders...
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