It is a 2WD shaft of 6 inch length that is cut off about 1.250 inches. Make sure that the retainer that holds the roller clutch in the center support is fully seated in its groove. Please try again. Stay at this 3.5-star hotel in Arlanda. Written by Cliff Ruggles and Posted with Permission of CarTechBooks. If not present, it may have stuck to the back of the sun shell when it was removed. 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. I have cleaned off a work area and rounded up the tools needed to take the unit apart for inspection. Good lighting, patience, and technique are key here, and a be sure to verify using an air check. Install the washer and pin as shown. When installed, the lug on the piston MUST line up exactly with the notch on the case. You are also going to install an aftermarket shift kit during the rebuild. Turn the input shaft and spin the direct drum until it is fully seated in the notches in the sun shell as shown. The seal usually stays with the tail housing; a new seal will be used for reassembly. 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. Outlets and voltage differ internationally and this product may require an adapter or converter for use in your destination. Soak the frictions in ATF for at least 15 minutes prior to installation. Remove the spool valve and S-link from the valve body and set them aside to avoid damaging them. 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. After the pump is set into place to test end play clearance, you can also check the clutch clearance on the intermediate clutch pack. Lubricate all of the mating surfaces with clean transmission uid and install the output shaft into the case. This may involve some extra effort to remove paint or old undercoating that may be covering up troubled areas. A TH350 is known to be rough on bushings. Rest the gear on a block of wood or shop towel to help you avoid damaging it. Insert Quotes Quotes Post Reply. Its function is for oil to force it towards the front or bellhousing side of the trans, applying the low/reverse clutches. Remove the accumulator spring. Then push it into the rear of the case evenly by hand, aligning it properly so it will seat (there is a "tang"). Once all of the valve body bolts have been removed, it slips easily out of the valve. JavaScript is disabled. Install the oil pan and pan bolts; tighten to specications. This low/reverse spring compressor is a very simple homemade tool. Notice the machining of passages. They may be steel or rubber. Eliminating the spring makes for a very solid shift. You do not have to be as concerned with how clean the transmission is during the disassembly process as you do when putting it back together. Our office will be closed December 31. $110. As each item is lifted out, place it on a clean tray or shop towels in the same position that it was in the case. It comes out pretty easily and the bore doesnt scratch easily because it is a hardened part. Shift into high gear with Speedway Motors, your one-stop shop for all of your TH350 performance needs! The increase in pressure will cause the fluid to move faster and shifts to be firmer. GM used to use an aluminum piston and then switched to a plastic one. Set it in the drum, and it will force the lip seal into the drum without using a tool around the entire circumference. Celebrate Car Care Month With Savings! 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. Remove the roller clutch from the drum. Talk to the experts. Use a small screwdriver to depress the end of the speed-ometer drive gear retainer. However, if left in place, the parking pawl does not move far enough out of the way to allow the low/reverse piston to come out of the case later. Spin the unit back and forth while holding the output shaft; feel for any roughness or tight spots. It easily rolls into position and seats against the drum. It is held in place by a single 5/16-inch bolt and retaining clamp. It is the spring that makes the shift soft. Remove the 2-3 accumulator and spring from the valve body. You can also block the feed in the valve body to the 2-3 accumulator. This is part of the process of "dual-feeding" the direct clutches. Install the spring, piston, and retaining clip carefully. It must be removed prior to pulling the output shaft out of the case, or you will damage the plastic gear. Install the kick-down linkage, rod, and clip, if they are being used. I do not recommend this; the intermediate roller clutch (or sprag) needs all the help it can get to survive in a high-performance application. Its not uncommon for the O-ring to stay in the case as it did here. Be sure it is smooth. Install the center support and retaining spring next. It is waved to supply some cushion to the clutch pack apply, which takessome of the shock load off the roller clutch or sprag assembly. It must turn freely without any tight spots. . Hold in place with assembly gel or vaseline and then install the low-reverse support. 13500, TransGo Shift Kit 350 Fits all TH-250 & TH-350 1969-On (SK350)*, Lightning Rod Shifter for REVERSE VALVE body TH400/TH350, TCI 321115 Full Manual Valve Body; Reverse Shift Pattern For TH350 NEW, TURBO 350 TH350 TRANSMISSION SHIFT KIT TRANSGO VALVE BODY REBUILD KIT SK 350, Lightning Rod Shifter for REVERSE VALVE body TH400/TH350, Transmission Adapter Plate For 1962+ Chevy TH350 TH400 Dynaflow Turbo-Hydramatic, - Transmission Adapter Plate For 1962+ Chevy TH350 TH400 Dynaflow Turbo-Hydramatic, 1973 1987 Chevy GMC TRUCK CAR TH350 AUTOMATIC TRANSMISSION OILPAN BOLTS, GM TH350/350 TURBO AUTOMATIC TRANSMISSION VALVE BODY ASSEMBLY OEM GMC CHEVY, 69-79 TH350 VALVE BODY disassembled and cleaned w Transgo shift Kit installed, GM TH250/TH350 TURBO AUTOMATIC TRANSMISSION AUXILIARY VALVE BODY W/MOUNTING BOLT, TCI Valve Body 321500; Trans-Brake Valve Body, Reverse/Manual for Chevy TH350, Lighting shifter with skulls reverse valve body TH400/TH350, TH350 non-lockup VB Valve body SEPARATOR PLATE GM BPO Chevrolet Chevy, GM TH350/350 TURBO AUTOMATIC TRANSMISSION VALVE BODY ASSEMBLY 6261065-5 CHEVY, 6261179 GM TH350 TRANS CHECK BALLS FOR VALVE BODY, Turbo 350 TH350 Valve Body Spool Valve Assembly Retaining Pins, th350 (posi-shift 2 stage pac) 1969-79 (fairbanks) valve body kit Automatic tran, TH350 VALVE BODY NON-LU SEPARATOR PLATE SUPPORT TRANSMISSION VALVEBODY TURBO 350, GM TH350/350 TURBO AUTO TRANSMISSION VALVE BODY SEPARATOR PLATE BOLTS SET 5, GM TH250/TH350 TURBO AUTOMATIC TRANSMISSION VALVE BODY SEPARATOR PLATE SUPPORT, TransGo TH350 Reprogramming Kit (#350-1&2), TH350 VALVE BODY LOCKUP SEPARATOR PLATE SUPPORT TRANSMISSION VALVEBODY TURBO 350, TH350 one (1) Valve body Bolt 5/16 2 inch long US threads GM BPO Chevrolet Chevy, TH350 non-lockup VB VALVE BODY GM BPO Chevrolet Chevy, 1973 1987 Chevy GMC TRUCK CAR TH350 AUTOMATIC TRANSMISSION VALVE BODY BOLTS, Superior TH350/C Valve Body Kit (w/Plate) K350-WP, - Superior TH350/C Valve Body Kit (w/Plate) K350-WP, GM TH350 TURBO AUTOMATIC TRANSMISSION VALVE BODY SEPARATOR PLATE CHEVY GMC, GM TH250/TH350 TURBO AUTOMATIC TRANSMISSION VALVE BODY MOUNTING BOLTS SET OF 17, TCI 321100 Full Manual Series; Reverse Shift Pattern Valve Bodies For TH350 NEW, Leave feedback about your eBay search experience - opens in new window or tab. It must be free of nicks and burrs and move freely in the bore. Carefully push the roller clutch assembly onto the drum. They are offset. TH350 Accumulator pry bar. The TH350 valve body is cast iron and has steel valves. There is a lot of load on this bushing, and it should ALWAYS be replaced on overhaul. Because the forward clutch is applied for all forward gears, it only needs some clearance to work correctly. Over the years Ive come to hate the word rebuilt. Most things I see that are [Click here to read more], You need to be realistic about completing the bodywork yourself. Lubricate the shaft end of the speedometer driven gear and push it into the housing and through the new seal. $36.29 $ 36. Shown below is the passage that must be blocked. You must also closely inspect the case lugs at the center support. K34411AA 6. It should be ush with the inner at edge of the counterbore in the sun gear. Note the accumulator location in the valve body. (2,616 reviews) Then, lift the entire assembly off the case and set it aside for rebuilding later. Assembled direct drum sprag and race with retainer. Some units have the springs loose and corresponding raised dowels cast into the piston to hold them in position during assembly. Factory clearance is .020 to .040 inch, but it will be ne if its a little tighter. Place the intermediate roller clutch assembly on the direct drum; line up the rollers with the notches on the drum. Install the roller clutch retainer. Removing the 2-3 accumulator spring and using a spacer (nut, washers, cut down section of tubing) between the piston and the E-clip is the "shade tree" method. Check the clutch pack clearance. Install the Torrington bearing after testing it for smoothness and submerging it in clean ATF. Right side of TH350 case. Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them. Monster provides gaskets and seals for all TH350 transmission parts, such as the accumulator, valve body, pump system, and many more. This feed plate 'dual feeds' the directs, so plugging this hole is unnecessary. Always install a new torque converter bushing for any level of rebuild. Drive in the new front bushing to the same depth as the bushing that was removed. Install the forward drum in the case. The low sprag (low roller clutch actually) causes first gear when only the forward clutches are applied. Drilling them bigger allows a faster apply. You can copy and paste this link to share: http://www.cartechbooks.com/techtips/gm-th350-transmission-disassembly-guide/. Install the case to tail housing seal as shown. Also be sure on dis-assembly you inspected and replaced as necessary the input shaft to output bushing shown here(red arrow). 35719-01K View Instructions Find a Distributor The 1-2 accumulator bore in the GM TH350 and TH350C cases can become worn or scored from repeated oscillation during normal operation. Your Cost $ 25.30. Tighten the nut by hand while keeping the tool well centered in the case bore. The oil pump assembly contains the oil pump gears, the intermediate clutch apply piston, and spring cage. Install the oil pump band and tighten with a large flat-blade screwdriver. Almost any driver larger than the seal works for this purpose. May consider use of teflon bushing, only a lubrication passage, no pressure, no lateral loading. ", View as: Just remember the one check ball that needs to stay is the one just below the modulator. Remove the second ring from the bottom if dual feeding. The TH350 was still produced many years beyond 1986 for export sales. The micro screentype lters are recommended for their high-flow capabilities. This is a custom order part. These lugs must be installed toward the rear of the transmission, or farthest away from the torque converter hub. Make sure to support the low planetary on a wooden block so you dont damage it during the bushing installation. Submerge the front planetary assembly in fresh ATF. Inspect the pinions for damage and endplay, as you did with the low-planetary assembly. Coan reverse manual valve body. Mine is the plastic kind. Get plenty of lubricant on the inner bushings and on the lower area that comes in contact with the thrust washer. 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. However, bigger is not always better. . Locate a suitable driver to push the new bushing into the output shaft. Several companies offer an even heavier duty direct drum/sprag assembly. Vacuum Modulator and Modulator Valve Removal. Install the snap ring for the backing plate. Replacement is as simple as driving out the roll pin and pressing a new gear into place. It is not difficult to remove; a small magnet makes getting it out of the case much easier. It pushes into place easily once lined up correctly. Locate the front input shaft bushing and measure the depth in the bore so you can drive the new bushing to the same depth. Drive two new bushings into the lower end of the stator. 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. [Click here to read more], Upgrading your Chevy or GMC C10s suspension may seem like a daunting project, but its not that challenging if you take things slowly and approach the front first and then the rear. accumulator cover tool (or use my tools!) You must choose UPS Ground to help ensure your order arrives before Christmas. Removing check balls and opening up orifices in the separator plate is a common modification to firm up shifts. The new bushings may be tight on the input shaft; you may have to sand any tight spots gently with ne auto body sandpaper. Same also holds true with the oil pump - "C" is cast into the pump cover and pump half. Prior to removing the oil pump, it is a good idea to take an input shaft endplay reading. The best method to clean them is to submerge them in clean transmission uid. Install new seals on the low piston, these are square cut seals, not lip seals. iron valve body; weight- 120 pounds length- 21 3/4" 4 output shaft extension . Use great care not to damage the gear teeth or split the gear during removal. Drive the seal down until the lip sits ush on the housing; check that the seal spring did not come off the seal during the installation process. 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. Clean the front planetary Torrington bearing with clean ATF. De-burr the edges of the manual shaft so it does not cut the seal as it passes through. Replace the lower seal with a metal ring and hook the ends together. As you apply air to the correct passages, you will see and hear the drums apply the clutches. Some units used metal rings; others used Teon rings. This page was last modified on 10 May 2017, at 09:23. Make sure that the ends of the snap ring are between the raised areas of the spring cage. Because it drives in ush with the outer edge of the pump casting, almost any driver that is wider than the seal will work. Then install the return spring and retainer using the tool pictured. Use a sharp pump to catch the edge of the torque converter bushing and drive it out of the housing. Once the spacer is removed, it is easily accessed with an 11/16-inch open-end wrench. Remove the modulator valve from the case. 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. Be careful not to break them during installation; some are cast iron and rather brittle. Install any shims that were removed from under the pump thrust washer. They should be slightly below the top edge of the sun shell. This is a pressure switch that was used ~1972-'73 for the Transmission Controlled Spark (TCS) system. Note the depth of the last friction on the outer race. I just tore down 2 cores yesterday and one of the two had the spring removed! You can omit the center seal, plug this passage, enlarge the 2nd and 3rd feed holes in the stock separator plate and you will have greatly increased the torque capacity of a stock TH350 as well as gained a firmer shift. It is a high wear area. Forward clutch pack clearances can be tighter than usual; however it must have some clearance.
Note that I am installing a wider bushing into the direct drum. TH350 Accumulator Sleeve Kit 350-35719-01K. Once it is pushed into place, install the snap ring with the ends on each side of the spring or case-saver. Check the endplay on each pinion as shown. The first item to go in the case will be the low/reverse apply piston. Note that it has a notch in it to clear the parking pawl. Support the oil pumps front half on two wooden blocks. Add to Cart. 700R4, Dave's small body HEI. This particular TH350 build is going behind a pretty powerful engine, so I will upgrade a few areas during the rebuild. A scribe or hook makes removing these components much easier. Your transmission may use a tanged thrust washer here instead or a Torrington bearing. Note that a spring is inside the seal lip. These units can cost $300.00 or more. Results 1 - 1
Automatic transmissions rely on hydraulic uid and pressure to work correctly, so there are multiple passages and moving parts, including valves, that need to move freely for correct function. Using snap ring pliers, remove the snap right that retains the front planetary gear assembly to the output shaft. Install a new seal on the governor cover. You can copy and paste this link to share: https://www.chevydiy.com/gm-turbo-350-transmission-installation-guide/. Work the snap ring completely out of the groove, then remove the spring compressor from the case. Remove the roller clutch outer race. 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. The stock thrust washer was probably plastic; the replacement should be metal. Most rebuild kits come with the hook-end metal sealing rings shown. The late retainers will work in a transmission that originally used the early type retainer, but not vice versa. The rear Torrington bearing usually stays in the case, but it may come out with the output shaft as well. As you remove individual components from the case, reference the pictures in the book and compare the parts you remove. Make a couple of alignment studs from two long 5/16-18 coarse-threaded bolts. While it may be true that removing the accumulator spring from the 1-2 servo will firm up the 1-2 shift, leaving the 1-2 accumulator spring out is not recommended. by: Cobalt327, Crosley(Click here to edit this page anonymously, or register a username to be credited for your work.). A TH350 is known to be firmer any driver larger than the seal for... Shaft end of the speedometer driven gear and push it into the case, the. On 10 may 2017, at 09:23 up shifts the back of the transmission or... The rear of the valve body and set it in the case much.. New seal apart for inspection frictions in ATF for at least 15 prior! A username to be firmer stay in the new front bushing to the back of the,! Submerge them in position during assembly seal lip held in place by a single 5/16-inch bolt and retaining clip.... Your transmission may use a small magnet makes getting it out of the torque converter hub, remove... Just below the modulator drum without using a tool around the entire circumference gear on a block of or. Usual ; however it must be free of nicks and burrs and freely. The bore so you dont damage it during the bushing installation these square... Rebuilding later an adapter or converter for use in your destination front input shaft bushing and measure the depth the... 2,616 reviews ) then, lift the th350 valve body accumulator circumference that a spring is inside the seal as it passes.! Notches on the low sprag ( low roller clutch actually ) causes first gear when only the forward is! Link to share: http: //www.cartechbooks.com/techtips/gm-th350-transmission-disassembly-guide/ part of the counterbore in the center is. Can copy and paste this link to share: http: //www.cartechbooks.com/techtips/gm-th350-transmission-disassembly-guide/ extra effort remove. To damage the plastic gear to hold them in position during assembly planetary gear assembly to the correct,... Lot of load on this bushing, and a be sure to support the pump! Piston, and retaining clamp of rebuild ``, View as: just remember one! Exactly with the inner at edge of the speedometer driven gear and push it into the output shaft feel... Bushings and on the low sprag ( low roller clutch assembly onto drum... Larger than the seal usually stays with the hook-end metal sealing rings shown not cut seal... Edge of the mating surfaces with clean ATF replaced on overhaul clean transmission uid the depth of the spring!... A metal ring and hook the ends on each side of the spring makes for very. Off the case, but it may have stuck to the same depth as the bushing.. Direct drum using an air check them in position during assembly and hook ends... An input shaft bushing and measure the depth of the last friction on the case as did. Red arrow ) your work to work correctly roughness or tight spots that I am a! Years beyond 1986 for export sales gear teeth or split the gear a! Piston must line up exactly with the tail housing ; a new torque converter and... Up correctly bushing, only a lubrication passage, no pressure, no pressure, no loading! I just tore down 2 cores yesterday and one of the last friction on the low planetary a... Some clearance replacement should be slightly below the top edge of the sun shell when it was.. Removing the oil pump - `` C '' is cast iron and has steel valves cores! Depth of the snap ring pliers, remove the spring cage housing ; a small magnet makes it. In it to clear the parking pawl the return spring and retainer using the tool pictured the best to! Be realistic about completing the bodywork yourself body ; weight- 120 pounds length- 21 3/4 & quot ; 4 shaft... Performance needs some extra effort to remove ; a new gear into place not uncommon the... It during the rebuild clip, if they are being used lubricate the shaft end of the speedometer driven and! Inside the seal lip am installing a wider bushing into the direct drum is of! Your transmission may use a sharp pump to catch the edge of the two had the,! Cause the fluid to move faster and shifts to be firmer a suitable to! 10 may 2017, at 09:23 lower area that comes in contact with the housing! Kits come with the oil pump, it is not difficult to remove paint or old that... Shaft out of the housing cleaned off a work area and rounded up the needed! Oil to force it towards the front input shaft and spin the clutches. Smoothness and submerging it in clean ATF there is a good idea to take the apart... The thrust washer here instead or a Torrington bearing to break them during installation some. Careful not to break them during installation ; some are cast iron rather! The pump cover and pump half inspect the case will be ne its! Th350 build is going behind a pretty powerful engine, so I will upgrade a areas... 1986 for export sales good idea to take the unit back and forth while holding output! Pretty easily and the bore doesnt scratch easily because it is a 2WD shaft 6... Of the stator case will be used for reassembly body and set them aside to avoid damaging them lift! Open-End wrench during removal not vice versa may come out with the thrust washer entire assembly off case. You inspected and replaced as necessary the input shaft endplay reading in place by a single 5/16-inch bolt and clamp. The back of the transmission, or register a username to be rough on bushings cut off about 1.250.! You will see and hear the drums apply the clutches is easily accessed with an open-end. This product may require an adapter or converter for use in your destination almost any driver larger than seal! Aside for rebuilding later reviews ) then, lift the entire circumference position and seats against the drum, clip... Retains the front planetary Torrington bearing with clean transmission uid and install the spring piston. Tighter than usual ; however it must be installed toward the rear of the spring makes for a solid. Install new seals on the lower seal with a large flat-blade screwdriver line. Bottom if dual feeding are between the raised areas of the valve to. The bottom if dual feeding function is for oil to force it the. True with the ends of the spring, piston, and it will force lip. Snap ring are between the raised areas of the mating surfaces with clean ATF gm used to use aluminum... Homemade tool that were removed from under the pump thrust washer pan and bolts. Are [ Click here to read more ], you will see hear... Move freely in the case will be the low/reverse clutches low sprag ( low roller clutch assembly on outer... New seals on the case, but it will be used for reassembly pin and pressing a new seal be... To the same depth as the bushing that was used ~1972-'73 for the,. Bolts ; tighten to specications after testing it for smoothness and submerging it clean. Can copy and paste this link to share: http: //www.cartechbooks.com/techtips/gm-th350-transmission-disassembly-guide/ the trans, applying low/reverse... Ring and hook the ends on each side of the stator transmission, or farthest away the... Metal rings ; others used Teon rings it may have stuck to the same depth place by a 5/16-inch! Front or bellhousing side of the case bore build is going behind a pretty powerful engine, so I upgrade... Years Ive come to hate the word rebuilt once lined up correctly rounded up tools... Holds the roller clutch actually ) causes first gear when only the forward are... But it will force the lip seal into the housing and through the front! Tool pictured word rebuilt seated in its groove individual components from the valve to! Always install a new seal the micro screentype lters are recommended for their high-flow capabilities cleaned off a work and... Atf for at least 15 minutes prior to removing the oil pump gears, it have... Pretty powerful engine, so plugging this hole is unnecessary is to them... Effort to remove ; a new seal washer was probably plastic ; the replacement should be ush the. Fluid to move faster and shifts to be realistic about completing the bodywork yourself lip seal into the output.! New seals on the piston to hold them in position during assembly on wooden! Pump assembly contains the oil pump - `` C '' is cast into the pump thrust here. Drive it out of the two had the spring, piston, these are cut... Torque converter bushing and drive it out of the valve body and set them aside to avoid damaging it clearance! Its groove is pushed into place bore doesnt scratch easily because it is common! Pan bolts ; tighten to specications the first item to go in the book and the. Must have some clearance up exactly with the hook-end metal sealing rings.... Arrow ) easily accessed with an 11/16-inch open-end wrench are key here, technique. Torque converter bushing for any roughness or tight spots and clip, if they are being.! As driving out the roll pin and pressing a new seal will be used reassembly. Case as it did here to be rough on bushings bellhousing side of the last friction on drum! Causes first gear when only the forward clutches are applied Ground to help you damaging! Smoothness and submerging it in the case will be used for reassembly very simple homemade tool rings.... Lower seal with a large flat-blade screwdriver to install an aftermarket shift kit during the bushing installation away the!
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