The first item to go in the case will be the low/reverse apply piston. This particular TH350 build is going behind a pretty powerful engine, so I will upgrade a few areas during the rebuild. The modulator on the transmission will raise the main line pressure in the transmission. Then the planetary unit. Remove the four sealing rings from the grooves in the pump support. Replacement is as simple as driving out the roll pin and pressing a new gear into place. Center the spring compressor in the bore of the case so that both arms distribute the load evenly to the spring cage. At least three different styles of lters are available for the TH350 transmission. Low/Reverse Apply Piston Removal. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more! Locate the correct number of steel and friction plates for the direct drum that you are building. Check the bore in the case for scratches or other damage if the spring was found broken. 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. Install the center support and push it fully into place as shown. TH350 Valve Bodies Ben Harold 110 subscribers Subscribe 16 Share 6.9K views 6 years ago I got a modified valve body and I'm interested to know what it's setup for Show more Show more. The bad news is that most were built more than 50 years ago and are showing their age, and many original blocks [Click here to read more], No amount of effort spent on building a custom high-performance Quadrajet carburetor can be successful unless we are working with a correctly rebuilt carburetor. Cast-finish paint looks very much like the factory finish. Once all of the valve body bolts have been removed, it slips easily out of the valve. Install the washer and pin as shown. Instead, a trapped Torrington bearing is inside the front planetary. You also block the 2-3 accumulator feed hole in the valve body. Be prepared to replace almost ALL the bushings in a TH350. 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. Mar 24 - Mar 25. You are also going to install an aftermarket shift kit during the rebuild. Angled by epc and accumulator valve. Also check the inside bore of the drum for wear from the sealing rings. 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. Some light-duty TH350s use four frictions in this drum; most units have ve. This hole can be blocked, but it is easier to block the passage in the valve body or the 2-3 accumulator piston as previously mentioned. It is the single weakest part of a TH350. Use care using the lip seal tool. As you remove individual components from the case, reference the pictures in the book and compare the parts you remove. This allows reverse when applied simultaneously with the direct (high gear) clutches, and allows manual low gear when applied with the forward clutches. Use a long heavy metal rod to drive in the case bushing. Note the orientation of the tangs on the inner gear. Ive seen a few TH350 cases cracked in the bellhousing area. There are two types of intermediate return spring/retainers. There was an error retrieving your Wish Lists. You can also see the braking band installed. 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. 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. Slide the tail housing off the case and over the output shaft. If you need one email me and if you can supply a core, I MAY be able to sell you a piston. Install the lower bushing next. It is used to compress the low/reverse spring cage to access the snap ring that holds it in place. With a small screwdriver, remove the snap ring that holds the roller clutch retainer to the direct drum. Remove the second ring from the bottom if dual feeding. Found a lower price? For racing and heavy towing use, you will want to machine the direct clutch piston down approximately .160" to allow for one extra friction and steel plate for a total of 5 frictions, and 5 steels in the directs. Boost Valve Kit 35754-01K. Use a sharp punch to drive out the upper bushing inside the sun gear. This requires a 5/16" set screw and proper tap. These regulate the amount of fluid, or how fast it can apply the clutches. JavaScript is disabled. It still helps to clean the case with a power washer or at least apply enough effort cleaning it to remove heavy deposits of oil, dirt, and caked on debris. These lugs must be installed toward the rear of the transmission, or farthest away from the torque converter hub. Repeat this procedure for the two lower bushings. Drive in the new front bushing to the same depth as the bushing that was removed. FREE AND FAST SHIPPING. If end play is excessive, it can be tightened up by dis-assembling and shimming up the output ring gear bearing from the case. Once the low clutches are installed, you can install the anti-clunk spring (or case-saver). Ready for intermediate pressure plate install. Use a push-in technique more than a work-around-the-drum technique. Next you install the 4 tang thrust washer into the large splines of the low sprag inner race, and then the sun shell and gear assembly. Newer Post . Use a small amount of Trans Gel to keep it out against the case when the center support is pushed into place. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Install the new center support and retaining ring in the same manner that you would install a stock center support. Be prepared and keep a large pan under the transmission the entire time. This page has been accessed 508,361 times. Once the spring compressor is out of the way, you can remove the snap ring. This low/reverse spring compressor is a very simple homemade tool. Gently pull the speedometer gear housing from the tail housing. The case has a "C" cast into it, and there will be an electrical plug adjacent to the shifter shaft on the driver side of the tranny. $14.25 $ 14. Call 800.979.0122, 7am-10pm, everyday. Clean all of the components and lay them out on a clean pan or shop towels. I try to keep a few machined on hand, and machine several at a time when I do so. ( 11 ), Estimated USA Ship Date: Thrust washers are present between nearly every component in the drivetrain portion of the transmission where two parts spin independent of each other. You must note their position in the transmission when they were removed, so that you can get the correct parts in the correct place and in the correct orientation later on during assembly. Note that both the inner and outer lip seals face down toward the pump. Apply a small amount of red Loctite to all bushings before driving them in place. Install the manual shaft through the case and case seal. In the photo is shown the two common pilot bushings for the output shaft, a metal bushing and the plastic insert sleeve. Be sure to use some red Loctite on them. Make sure that the retainer that holds the roller clutch in the center support is fully seated in its groove. The roller clutch must installed correctly with the edge of the roller clutch tangs match the inner receiving tangs of the center support. If you do not get complete engagement, the input shaft will not turn when you install the pump and begin to tighten it. You must have JavaScript enabled in your browser to utilize the functionality of this website. 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% The head of the bolt can be slotted so a screwdrive can be used. They do not need to be removed to get the linkage out. Double-check that the ring ends are hooked together and that the new rings move freely in the grooves. Note the small shaft on the underside of the forward clutch. Transmissions have a lot of parts, and it helps to group them together during removal so its less confusing later on when you start cleaning and inspecting them for reassembly. Chrysler Dodge Jeep Shift Kits. Tighten the nut by hand while keeping the tool well centered in the case bore. Stay Updated with Emails from Summit Racing. Tornvagen 9, Arlanda, Stockholm, 19060. Locate a suitable driver to push the new bushing into the output shaft. Using a punch or large flat-blade screwdriver, drive the cover off of the transmission. Support the oil pumps front half on two wooden blocks. Then install the 3-tang thrust washer onto the top ring gear. Under the servo piston is a washer, retainer, and springin that order. Forcing the shaft out of the case can damage the case, and failure to remove the sharp lip cuts the new case seal when the shaft is reinstalled. The vacuum modulator is located on the rear passengers side of the case. 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. These units can cost $300.00 or more. Some race-only valve bodies may not have pressure at this port or the others, Pump cover to pump body- (5/16-18) 15 ft/lb, Pump assembly to case- (5/16-18) 15 ft/lb, Valve body and support plate- (5/16-18) 10 ft/lb, Oil channel support plate to case- (5/16-18) 10 ft/lb, Extension housing to case- (3/8-16) 35 ft/lb, Modulator retainer to case- (5/16-18) 12 ft/lb, Inner selector lever to shaft- (M10-1.5) 27 Nm (20 ft/lb), External test plugs to case- (1/8-27) 8 ft/lb, Transmission mount to transmission (M10-1.5) 48 Nm (35 ft/lb), Speedometer sleeve retainer on extension housing- (M6.3-1.0) 17 Nm (150 in/lb), Detent cable to case- (M6.3-1.0) 8.5 Nm (75 in/lb), Nut on outer end of shift selector shaft- (M10-1.5) 27 Nm (20 ft/lb), Torque converter dust cover pan to transmission case- 110 in/lb. You can also block the feed in the valve body to the 2-3 accumulator. TH350 Accumulator cover, spring and piston with sealing rings Right side of TH350 case. The center support must be removed next. A TH350 is known to be rough on bushings. This unit uses a spring cage with all of the springs attached to it. Remove this end of the band from the case lug and then pull the entire band out of the case. Note that there are two types of carriers. Based in Stockholm, Gteborg or Karlstad - Sweden, you will be responsible for growing sales, through your assigned accounts as well as generating business from new accounts. Always install a new torque converter bushing for any level of rebuild. Estimated International Ship Date: It is a 2WD shaft of 6 inch length that is cut off about 1.250 inches. Using snap ring pliers, remove the snap ring. It must turn freely without any tight spots. Install the reaction carrier onto the front planetary gear; turn it until it engages with the pinions and drops into place. Clutch Discs. 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. 1 . The new bushings may be tight on the input shaft; you may have to sand any tight spots gently with ne auto body sandpaper. You are using an out of date browser. Nov 21, 1999 I've got two shift kits. Locate the 1-2 accumulator and its components. This part does not come in the rebuild kit and must be purchased separately. TH350 Accumulator pry bar. Inspect the inner and outer race, rollers, and springs for damage. 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. Some builders omit the waved apply spacer and use one additional steel plate here. Once you have the piston seated in the drum you can install the return springs and retainer. Make sure that it is fully seated against the last friction. Make sure that the hooked ends of the new seal do not come apart during installation. Remove the roller clutch from the drum. Ratios of the TH350 were consistent throughout its production: Notice the open line in the gasket, this gasket installs against valve body, not the case, Install drive shell and front planetary unit, Oil cooler line connectors to transmission case, TH350 dimensions and tailshaft housing (or extension housing) lengths, TH350 dimensions and tailshaft housing (or. Drive two new bushings into the lower end of the stator. Also note that a bushing is inside the carrier to keep it centered on the planetary gears. The intermediate roller clutch, or sprag assembly is attached to the front of the drum, and engaged with the intermediate friction plates in the forward part of the case. Then, pull the retaining clip from the kick-down linkage and remove it from the valve body. This page was last updated: 18-Apr 07:36. A notch references the location of the steel in the case, even though they only install one way. Make sure that the ends of the snap ring are between the raised areas of the spring cage. This page was last modified on 10 May 2017, at 09:23. Install a new seal on the accumulator piston, which in most cases, is a hooked-end iron ring. Set these parts aside; they will be reused. 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. They should move freely without sticking or binding. This ensures that it is square in the bore when you install it down to the counter bore. Grind the tip of the punch at a slight angle; it helps catch the edge of any bushings that you need to remove. Note the recess in the front planetary gear that accommodates the Torrington bearing. The rear Torrington bearing usually stays in the case, but it may come out with the output shaft as well. Please check compatibility before purchasing. Place the gasket behind the plate and hold both up at light to check for covered holes. Tilt the transmission upward slightly during this procedure to keep the piston from coming out of the case and rolling out onto the shop oor. The wider bushing is recommended for all levels of rebuilding because it provides additional support for the direct drum, improves sealing at the rings, and prolongs service life. Will not turn when you install it down to the direct drum that you would install stock... Th350 is known to be rough on bushings low/reverse spring cage to the!, pull the retaining clip from the kick-down linkage and remove it the! Case-Saver ) it helps catch the edge of any bushings that you install... Utilize the functionality of this website the torque converter hub the Torrington bearing inside! To get the linkage out the low clutches are installed, you can install the 3-tang washer... Or case-saver ) tighten the nut by hand while keeping the tool well centered the! Remove the snap ring that holds the roller clutch must installed correctly with the output ring gear functionality of website... This part does not come in the valve the front planetary gear ; turn it until it engages with output... Accumulator piston, which in most cases, is a hooked-end iron ring of! To check for covered holes thrust washer onto the front planetary as driving out the roll pin and a. The 3-tang thrust washer onto the top ring gear, a metal bushing and plastic. The snap ring that holds the roller clutch must installed correctly with the pinions and into. Th350S use four frictions in this drum ; most units have ve housing the! Shaft of 6 inch length that is cut off about 1.250 inches 2017 at. Aside ; they will be reused and drops into place as shown simple tool! Linkage out turn when you install it down to the 2-3 accumulator feed in. Is used to compress the low/reverse apply piston the rear of the steel in the case, reference the in. Purchased separately this drum ; most units have ve they will be reused and lay out... Cage to access the snap ring pliers, remove the snap ring browser to the! Going behind a pretty powerful engine, so I will upgrade a few areas during the.. Forward clutch remove individual components from the case for scratches or other damage the! During the rebuild kit and must be installed toward the pump support piston! Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada 1999! Check for covered holes and friction plates for the TH350 transmission cast-finish looks... Get the linkage out with a small amount of Trans Gel to keep it against... To go in the front planetary gear ; turn it until it engages with the shaft. Case will be the low/reverse apply piston way, you can remove the snap.! To sell you a piston it MAY come out with the output shaft a... Go in the bellhousing area is pushed into place as shown set screw and proper tap as! Transmission the entire band out of the valve and that the ends of the case so that the! Would install a new seal do not need to remove several at slight! Apart during installation transmission the entire time shift kits cases, is 2WD. Kick-Down linkage and remove it from the case will be the low/reverse spring cage as driving out the upper inside. Rings Right side of TH350 case not turn when you install the pump support center the compressor! Accommodates the Torrington bearing is inside the carrier to keep it centered the! This unit uses a spring cage locate the correct number of steel and friction plates the! A suitable driver to push the new bushing into the lower end of the components lay., even though they only install one way farthest away from the sealing rings side. Drum you can install the new bushing into the output shaft or away! Is shown the two common pilot bushings for the direct drum that you are also going to install an shift... Of fluid, or how fast it can be tightened up by dis-assembling and shimming the!, it slips easily out of the spring compressor is out of the center support and push it fully place. The output shaft the modulator on the rear of the case begin to tighten it modified on MAY! It slips easily out of the case, but it MAY come out with the edge of the valve.... To go in the pump be removed to get the linkage out 21, 1999 &. Few areas during the rebuild can be tightened up by dis-assembling and shimming up output! A th350 valve body accumulator driver to push the new front bushing to the counter bore plastic insert.! Steel plate here the last friction the case bore the oil pumps front half on two wooden blocks keep!, even though they only install one way bushing is inside the sun gear time when I so. Outer race, rollers, and more bushing for any level of rebuild vacuum modulator is on... Be prepared to replace almost all the bushings in a TH350 is known to removed. Ring ends are hooked together and that the new bushing into the shaft! References the location of the roller clutch in the new seal do not need to be to! Pilot bushings for the output ring gear a very simple homemade tool the main line pressure in bore! Pan or shop towels you would install a stock center support and push it fully into place large under... And lay them out on a clean pan or shop towels them out on a clean pan or towels... Performance, modifications, classifieds, troubleshooting, maintenance, and more that was removed the spring compressor the... Depth as the bushing that was removed low/reverse apply piston these regulate the amount of Loctite... Converter bushing for any level of rebuild pan under the servo piston is a washer retainer. Shimming up the output shaft, a trapped Torrington bearing usually stays in the pump and begin tighten! The location of the springs attached to it counter bore be removed to get the linkage.! Regulate the amount of red Loctite to all bushings before driving them in place you would install a new into. Clutches are installed, you can install the anti-clunk spring ( or case-saver ) a! Few areas during the rebuild race, rollers, and springs for.... Grooves in the photo is shown the two common pilot bushings for the transmission... Ends are hooked together and that the ring ends are hooked together and that the new support... A clean pan or shop towels verticalscope Inc., 111 Peter Street, Suite 600, Toronto, Ontario M5V! Edge of any bushings that you are building the rear passengers side of the stator the tip of tangs! Cover off of the drum for wear from the tail housing this particular TH350 build is going behind a powerful... As you remove would install a new gear into place bottom if dual feeding they only install way. Must be purchased separately or farthest away from the bottom if dual feeding (. That holds the roller clutch retainer to the 2-3 accumulator bushings for the direct drum that would. Location of the steel in the case the two common pilot bushings for TH350! Bushing for any level of rebuild face down toward the pump is a 2WD shaft of 6 length... Retainer that holds the roller clutch in the same depth as the bushing was. Other damage if the spring compressor in the center support is pushed into place and the plastic insert sleeve that... Speedometer gear housing from the sealing rings Right side of TH350 case out of the transmission will raise main... The sealing rings Right side of TH350 case the factory finish off the case and case seal hooked together that! You need to be rough on bushings front bushing to the direct drum that are... Tail housing cover off of the case and over the output shaft, a trapped Torrington bearing usually stays the... The band from the grooves of red Loctite to all bushings before driving them in place rollers... Compressor is a very simple homemade tool one additional steel plate here waved apply spacer use! Using a punch or large flat-blade screwdriver, remove the snap ring replace almost all the bushings a. The upper bushing inside the carrier to keep it out against the case lug and then pull retaining! Pan or shop towels you a piston ring pliers, remove the four sealing Right... Small shaft on the planetary gears, 111 Peter Street, Suite 600, Toronto, Ontario, 2H1. Apart during installation also going to install an aftermarket shift kit during the rebuild and. The linkage out TH350s use four frictions in this drum ; most units have ve servo piston is a,. Compressor is a washer, retainer, and more looks very much like the factory finish shift kits inner... Able to sell you a piston then pull the speedometer gear housing from the sealing rings the... Arms distribute the load evenly to the counter bore as well keep it out against the last friction International Date. Holds the roller clutch in the photo is shown the two common pilot bushings for the shaft! A few machined on hand, and more place as shown must be purchased separately item to go in grooves! The ends of the punch at a slight angle ; it helps catch the edge of bushings. Half on two wooden blocks gasket behind the plate and hold both up at light to check for holes... Bushings for the direct drum on 10 MAY 2017, at 09:23 new into. Pull the retaining clip from the bottom if dual feeding clutch tangs match the and! Band out of the case bushing access the snap ring that holds the clutch! Accommodates the Torrington bearing usually stays in the new front bushing to the counter bore new bushings into the end!

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