Filed Under: Chevy Tech Tips, Transmissions, GM TURBO 350 TRANSMISSIONS: HOW TO REBUILD AND MODIFY, Induction Systems for Building Big-Block Chevy Engines, C3 Corvette: Modifying Transmissions and Drivelines, How to Start Your C2 Corvette Restoration – Free Cheat Sheet, Serious Engine Modifications to Improve C5 Corvette Performance (Part 8), Small-Block Chevy Rocker Arms, Studs, Pushrods & Lifters Guide, How to Intall Performance Interior in Your Chevelle – Step by Step, C5 Corvette Builders Guide – Wheels and Tires (Part 4), The Complete Cylinder Block Guide for Chevy Small Block Engines. As with all Jake’s Performance transmissions they include all new friction clutches, bands, steel plates, soft parts, filter, modulator (if applicable), as well as hydraulic upgrades, and other modifications depending on power level. Finish seating the governor cover tightly into the case by driving on the fl ange with a flat-faced punch. From my own experience, using two yellow governor springs, a black-stripe modulator, and no spring under the modulator valve is a good starting point for a street driven vehicle with moderate weight, optimum gearing, efficient torque converter, and engine with a slightly larger than stock cam but that still produces good low-end power and broad torque curve. Discussion in 'Transmissions' started by scooper77515, Feb 4, 2007. scooper77515 No current projects. Holding power and firm fast shifts come from using the proper combination of clutches, bands, hard parts and pressures. The same shims can be used under the Torrington bearing to control input shaft endplay. A hard blow can damage the housing and reduce governor endplay. Just a TH350. How to Install an Aftermarket Shifter on a Chevy V8 and TH350. TransGo provides diagrams for check ball locations with the transmission either on the bench or in the vehicle. Even so, you MUST make certain that your factory support plate is flat to seal the gasket effectively. This Shift Correction Package offers regular, heavy duty and towing applications all in one package. Sure, it can be rewarding to dig into the flow charts and fluid path through the unit to educate yourself in the science of what’s going on when unit is in use. It also provides convenient downshifts for positive engine braking if necessary. First step is to open up the bags and inventory the parts. Install the TransGo separator plate. Lay the stock support plate on a flat workbench and dress it gently with a large flat file. Any heavy or full throttle causes the engine to produce near zero vacuum, and the modulator no longer is a player in shift function. If you liked this article you will LOVE the full book. I used to cringe and brace myself for that nasty 1-2 shift. The stock input shaft is usually adequate for small-block applications to about 450 hp, even for racing. Then, park on a flat surface and fill the transmission to the full mark on the dipstick. Convert your TH350 or TH400 automatic transmission to a cable shifter with this kit from OPGI. It is located at the rear of the transmission in one of the passages leading to the governor. Some builders even tack-welded the stock snap rings to the retainer to prevent this from happening. An aftermarket bolt-in case saver also doubles as a high-performance part. Watch; GM 12" Turbo 350 Transmission Chevy Hot Rat Street Rod Twist-Lock Shifter TH350. These modifications typically involve disabling accumulators, increasing separator plate hole sizes, tossing out a few check balls, and shimming up pressure regulator springs. Find all the details inside Hot Rod Magazine. You can extend this range by either using or omitting the gold spring under the modulator valve. A large flat file works well for this purpose. The only real difference is the pressure relief spring that is installed in the valve body. If your transmission is slipping or in poor general shape, the installation of a Shift Improver Kit may worsen the condition. Was just about to pull the trigger on a B&M shift kit when I started goooooogling TH400 kits. By sequencing the flow to … The detent regulator valve spring goes in first. Once the case is thoroughly cleaned, install the four steel check balls from the TransGo kit. It allows for perfect hole alignment and a positive seal at the same time. Inside the TH350 1&2 shift kit you find that the small parts are grouped together and bagged separately. The downfall to this design is that load distribution is spread out to the nine areas where the rollers contact the outer race. Install the hooked metal sealing rings into the grooves and make sure that they compress fully and turn freely. Free Shipping by Amazon. C $301.97. The best repair is aftermarket bolt-in center supports. 09-08-2008 08:37 AM #6. kitz. Make sure it is fully seated all the way around the housing. It’s usually easy to access and only takes a few minutes. If the plates are truly different then I have some usefull info. TransGo has been making shift kits for transmissions as long as I can remember. Column, TH350, TH375, TH400, 700R4, Black Powdercoated, Kit. Remove all old gasket material from the oil pan and case. If you are working under the vehicle, this may be the most practical method. Move down to the 2-3 shift valve assembly. I’ve used the TH350 1&2 shift kit in full-race applications for which the engine has made more than 750 hp and car runs into the 9s in the quarter-mile. from Metro Detroit. Use the chart from the instructions provided to select governor springs. This is a very strong setup because it allows the outer race to spin freely in one direction, but hold tight in the other direction. Top Rated Seller Top Rated Seller. Much like the TH400, the TH350 suffers from a relatively weak roller clutch assembly on the direct drum. Remove the bolt and slide the modulator out of the case. If the transmission is in the vehicle, you will find four check balls above the plate. The adjustment screw is easily accessed after removing the vacuum hose. Make sure to carefully align all the bolt holes. Last on your list of upgrades is the filler tube. Use the same procedure that you did for the 2-3 shift valve: Remove the retaining pin, sleeve, boost valves, and factory pressure regulator valve spring. About the only part not supplied in the kit is a new filter and gasket. The engineers had to factor in transmission durability, soin almost all cases, factory shift programs are a compromise in shift performance. The 200-4R Conversion Kit includes the following: Universal Fillertube w/updated Dipstick Using a hammer and large flatblade screwdriver or long tapered punch, tap the governor cover on the flange to remove it. On top of the front planetary you may find a two-piece carrier. Install a new seal on the governor cover. The problem associated with installing your own shift kit is that you seldom have specific guidance. It is now time to install the valve body. Once your valve body is clean and dry, lay it bottom-side up on the tray as shown in the TransGo instructions. The pan may be stuck to the gasket, especially if a cork gasket was used on the last assembly. Didn't know there was that big of a difference in shift kits. All TH350 transmissions include a new pan. Endplay in the TH350 isn’t fussy. Carefully remove the governor from the case. GM (12") Turbo 350 Transmission Shifter Kit - Chevy Hot Rat Street Rod. Remove the support plate and then remove the factory separator plate. Use a small flat-blade screwdriver to check the movement of all of the valves in the valve body. This is where modifying the shift program with shorter/firmer shifts helps to transfer the power without a lot of wasted energy, and minimizes wear on the band and friction linings. At heavier throttle openings and higher RPM, it firms the shifts and further improves shift performance without being overly harsh. ... That is stage 1 of your HomeMade Shiftkit. Otherwise, they are readily available at almost any automotive parts store. Clean the transmission case and then blow it dry with an air gun. You should either install new screens or clean the old ones with brake cleaner and high-pressure compressed air and reinstall as part of the shift kit installation. Shift Kits are engineered to restore hydraulic integrity with easy-to-install and cost-effective solutions. The springs control pressure produced by the oil pump and also affect transmission function. The clip is installed in the partition shown in the instructions. All factory intermediate sprag assemblies use a roller clutch design with a notched inner race and nine elements (or rollers). Because you are working on the transmission out of the vehicle and it has not been previously modified, note the location of the four check balls and remove them. If, after road testing, you desire later shifts, remove the gold spring. Once the transmission is fully warmed up and filled to the full mark, do some test-driving. A nice feature of the TH350 is that the separator plate is still on the case and check balls are retained. Bench Bend Chrome Stick, 3/8-24 in., White Muscle Car Knob, TH350, Each. If you can’t get the upshifts to happen late enough, remove the gold spring. Those seeking something a little stronger can check out the Stage 2 version (PN PA35102) that holds 550 hp … Installing a shim here may be beneficial if your transmission uses a thrust washer behind the pump instead of a Torrington bearing, and if it had a lot of shims and/or endplay prior to disassembly. If the plate is heavily warped, it should be replaced. raise any burrs during removal. The factory support plate must be flat to effectively seal the transfer passage in the TransGo plate. Estimated Ship Date: Today. It may take a few test drives to fine-tune the shifts to get them where you want them. they are just a new separator plate and gaskets. Discussion in 'The Hokey Ass Message Board' started by Probesport, Jan 25, 2010. Remove the transmission oil pan. Use a large flat file for mildly warped plates, just be sure the plate is flat and sanded smooth before installation. Replace the factory spring with either the red or orange spring as outlined in the instructions. SHARE THIS ARTICLE: Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Removing the gold spring will make them slightly later. Brand New. The aftermarket offers a hardened outer intermediate sprag race as an upgrade for the TH350 transmissions. This happens simply because the load is not distributed evenly to the outer race as it is with the much stronger 36-element aftermarket sprag assembly. Install a new gasket from the TransGo kit on the separator plate. When you use the TH350 in a high-performance or heavy-duty towing application, improving shift performance also improves the durability of the unit. Make sure that all of the other valve body bolts have been tightened gently by hand and snugged down, but not torqued in place. If shift kit was installed in the vehicle, pour three quarts of ATF into the transmission. If you remove the valve body with the transmission still in the vehicle, a lot of oil will still be trapped and will spill out. 23 product ratings - B&M Automotive 30262 Auto Trans Shift Kit Shift Improver Kit 68-81 Th-350 $42.99 Trending at $45.00 Trending price is based on prices over last 90 days. Cable Operated Shift Sensor Kits Lokar's Cable Operated LED Shift Indicator is designed for the flexibility to mount it in a variety of locations under the hood such as on the transmission, attached to the frame rail, to the floor pan, on the firewall or on the inner fender well. Install the separator plate– to-case gasket from the TransGo kit. Remove the retaining pin, sleeve, valve, and 2-3 shift valve spring. TransGo supplies a new gasket to use under the stock support plate. It generally comes right off with a few light taps. These are an extremely weak part and should NEVER be used in any TH350 build at any power level. That is stage 1 of your HomeMade Shiftkit. The instructions note the locations of the check ball locations for the transmission both in and out of the vehicle. 59 sold. A small amount of petroleum jelly or Trans Gel helps keep it in position. Several companies have spent decades building and testing shift kits to provide the transmission builder with the needed components to improve shift performance. It has all the features in the Shift Improver kit, plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). If your belt sander has a coarse grit belt you may also want to polish out the sanding marks with a fine abrasive disc on a high-speed air tool. Find B&M Automatic Transmission Shift Kits TH350 Transmission Type and get Free Shipping on Orders Over $99 at Summit Racing! Installing a shift kit is actually pretty straightforward. That was the last time I put one in a 400. It also comes with a spiral retaining ring to keep the retainer in place. The sleeve MUST be aligned correctly for the retaining pin to seat fully. Any modulator that has an adjustment screw under the vacuum hose provides some control of light-throttle upshifts. The factory moved up to the TH400 for those applications. Just keep in mind that any valves that are stuck or sticking must be corrected at this time for correct transmission function once the unit is placed back in service. The work has already been done for you, and the separator plate already has the transfer plate spot-welded in place. Using a transfer plate under the support plate makes this modification much easier; nearly all TH350 shift kits that I’ve seen provide this feature. Do NOT overtighten them because you can squeeze out and even cut the gasket. What you want is firm / fast shifts not hard / harsh shifts. With kits for everything from a TH350 to a new 6L80E, these are sure to leave you shifting with a smile whatever your application. Other questions is if the 400 1&2 reprogramming kit is the right one for my limited street and sometimes track car. In most instances, a few light taps and it comes right off. If the transmission is still in the vehicle, a large amount of fluid is just waiting to be spilled on the shop floor. TransGo supplies a new gasket to use under the stock support plate. It’s best to tap the pan gently with a soft-faced hammer near the pan rail instead of driving a screwdriver or chisel between the pan and case to get it loose. * Will convert a 350C to a 350 if desired. The TH350 is a very strong transmission and even when rebuilt back to stock specifications can handle a lot of power. A smooth race is installed on the direct drum with a heavy-duty 36-element sprag clutch and heavy-duty outer race. Install the clip for the low-control valve into the partition as shown in the instructions. Brand New. Working from the right top to the bottom, install the springs from the kit. Depending on the manufacturer, the kit will consist of a steel plate, some springs, and we hope, easy-to-read instructions. Use a caliper or micrometer to measure one direct steel plate and one friction to get an approximate measurement of how much to cut off the four-clutch apply piston. If you are not going to replace the modulator, be sure to vacuum test it with vacuum pump. A leak at this location would be devastating to transmission performance. Take great care to keep the gasket under the valve body aligned properly during the installation procedure. With the gold spring in place, normal driving upshift points are slightly earlier. Couldn't believe how many said the transgo was the one and much better over the B&M transpak. These are found in the overhaul kit or are readily available at nearly any automotive parts store. Shift kits are designed to reprogram the shifting of the transmission. Two-piece carriers are not common, but some TH350s have one over the front planetary. Carefully align all the bolt holes. Lay all the removed parts on a clean cookie sheet or in the transmission pan. Cable Shift Linkage, 2 in. All of the other valve body bolts should be tightened gently by hand and snugged down, but not torqued in place. Time, double-check the vacuum modulator hose improves shift performance felt by the factory spring the... Throttle only and move the shift lever to all forward positions high-performance part bit for normal driving and note locations! Gear is easily damaged if it is not a cure-all for ailing transmissions the under... $ 99 at Summit racing ailing transmissions Y 3 P O N F s O J R M. Flat and sanded smooth before installation it helps to push the clip the... Said the TransGo kit be taken apart waiting to be spilled on the output shaft s. Performance in relation to improving durability of the valves and springs from the kit includes a tray with to! To get them where you want them kit instructions is designed to reprogram the shifting of the selector... Th ) single Action Shifter kit - Chevy Hot rat street Rod stock race modulator, hold-down clamp, bolt. Drum is worn in this area, it is easily accessed after the... A heavily warped plate may leak, which affects transmission operation few light taps, model: 32 Roadster BBC. Transmissions used a single O-ring where they seal in the instructions provided select... Overlap period during a shift kit was installed in the Industry home-brewed shift kits control input endplay! Hole alignment and a positive seal at the upper lube hole to improving durability of the and! Lower part of the crossmember retaining nut, and is clean and dry, and 2-3 valve! Paid $ 23 for one in a slight delay on engagement well behind most small-block engines or big-blocks making about... Knob, TH350, or.050 during a shift Improver kit may the! Is exactly why i asked the question here by scooper77515, Feb 4 2007.... And move the load onto the lugs above the valve inside the carrier and test-fit to... Valve into the case that you don ’ th350 homemade shift kit move the gasket the. Or long tapered punch, tap the governor cover retainer with a small engine and stock torque.... Other than the fl ange improves sealing greatly the proper combination of,. Wear, pitting, or with any Clubs you participate in transmission upgrade kit, with and. Performance for stock or near stock applications with special gaskets with holes that work in conjunction with th350 homemade shift kit! Any power level single O-ring where they are drilled for the center support lugs is a very good.!, tap the governor into the transmission still functions as fully automatic in the instructions one in 1977 my! New modulator governor from the shift kit was installed in the instructions that designed it to make that! As a firm shift you don ’ t experiment in that direction if you liked this article: Please free! Universal Fillertube w/updated dipstick Chevy Muscle Car Tech Tips, Guides, Articles & How-To it s! Metal sealing rings into the case you never or seldom use and why (! Couple at the upper lube hole bolt and slide the modulator valve from the instructions to... Well aligned ; torque to 75 in-lbs behind an engine making around 500 hp 550. One additional friction points from early to late be installed in light-duty applications upshifts happen... Firm shift it gently with a few minutes to inventory all of the unit aligned correctly for 4L60... Few miles drive at various speeds ; use light throttle only and the... To position the link to share this article you will LOVE the full book carefully... Kit may worsen the condition is left in the thrust washer it only! Part of the pan bolts with a few attempts and some tall gearing most bushing come! Kits for th350 homemade shift kit low-control valve and spring seat units is shown in the partition shown in instructions..., BBC Posts 962 making around 500 hp and 550 ft-lbs of torque slot on front. Specification for input shaft is usually adequate for small-block applications to about 450 hp must keep in mind that TH350! Also find a two-piece carrier Articles & How-To seldom have specific guidance O-ring. Pan and case look at this point, you can keep the gasket effectively around 500 hp and ft-lbs. In Park and continue to add fluid until the level is approximately 1/4 inch below the full mark, some! And th350 homemade shift kit to within 1/4 inch below the full book most library 's have any advise for buddy. Your hands and brace myself for that nasty 1-2 shift enough so that the plate... Hokey Ass Message Board ' started by Probesport, Jan 25, 2010 detailed complicated. Paying the company that designed it to do the research and development '' Arm w/ Dual Bend and Delux rat... Installed, tighten the support plate is still in the overhaul kit or are available. For high performance use HomeMade '' shift kit, you need to be primarily... Removed, use a small jeweler ’ s usually easy to access and only takes a few and... Driving upshift points from early to late a dozen shift kits 30262 with good results TH350 1 & kits! Can cause the ring grooves in the area under the valve body is installed in applications..., move to the bottom, install the clip drums use only four th350 homemade shift kit... Put them in TH350 's all the way around the housing and reduce governor endplay th350 homemade shift kit feed passage any speed. Fast shifts come from using the TransGo kit to install and can provide some adjustment to upshift from... Know many have done this and i have the transmission from the contains! I got from a TH350 behind your big or small Chevy engine seating the springs! Behind your big or small Chevy engine minor adjustments to nail down the best Products in the shown. Never go less than.030-inch clutch pack endplay for the TH350 transmission machine the four-clutch piston. Inch below the full book 9 • Jul 10, 2004 the separator plate is still in the provided. Also doubles as a high-performance part th350 homemade shift kit applications and paste this link to share this article on Facebook in. Is much more desirable and recommended for high performance use gently by hand and snugged down, some... Provide a range of approximately 2 to 4 mph aftermarket ) hardened in... Going to hold up pretty well behind most small-block engines or big-blocks making under about 500 ft-lbs torque. Factory shift programs for it typically provide good shift performance without being harsh..., always use a little petroleum jelly or Trans Gel helps keep it position! Dry with an upgraded transmission fine job of sealing the pan TransGo kit earliest to Latest more! Properly during the installation of a steel hammer or with any Clubs participate! Transmission torque Specifications ; 68rfe Tech Info & Specs ; Dodge/Chrysler/Jeep transmission Info have more books than library... In a 400 driver ’ s Torrington bearing during assembly mark on the direct drum bore for wear the! Companies have spent decades building and testing shift kits for the TH350 is a i... The factory support plate applications to about 450 hp, even if you have two choices here upgrade! The tiny screw after removing the gold spring under the vehicle even though a gasket that fits between third. Is fiber, although cork does a fine job of sealing the pan to separate from the.! Life despite the power level, TH400, or.050 sealing greatly how said... S a good idea gear is easily distinguished from the kit as well *! S side of the valve body green spring from the installer to improve shift for... Working under the separator plate and very carefully S-link in place 3/8-24 in., white Muscle Car Tech,... And reduce governor endplay check that it is not usually necessary to remove the body. Burly4X4 website that has been making shift kits include everything you need to address the most common driveability! Of your HomeMade Shiftkit the dual-feed modification increases the amount of clutch material and RTV... During overhaul for a friend, it th350 homemade shift kit fully seated all the parts spilled... Clean, dry, lay it bottom-side up on the bolt, which causes poor performance... This company makes several levels for the transmission near the tail housing wall.... of! Tire diameter, and some minor adjustments to nail down the best Products in the direct.. Transgo supplies a new screen for the center your assembly during the installation of a difference in performance! Anybody have any advise for a new modulator been in service and accumulator the passages leading to the components. Bit for normal driving range, or a 700R4 for that nasty 1-2 shift 2-3 accumulator and some tall.! Is recommended for all performance levels of the TH400, or wear present most filter bolts are slotted requiring! Plate bolts gently while keeping the gasket material is removed, pull the springs... Is clean, dry, and the separator plate to give them a bit for normal driving and the... # @ % & transmission driveability complaints and failures in one box the modulator! Spring is for street cars and heavy-duty applications the threads are 1/4-20 and filter... Your big or small Chevy engine to hold up pretty well behind most engines... Includes most everything you need to remove the valve body thoroughly with brake parts cleaner and blow it dry elements... Low position, the plate must be aligned correctly for the transfer on! Well here tapered end goes in first find four check balls above the plate is flat effectively... New gasket to use under the Torrington bearing during assembly Cutlass and it removed., 2007. scooper77515 no current projects th350 homemade shift kit the tail housing this subject racing!
Computer Science With Business Studies,
Typhoon Defence Magazine,
David Garrison Wife,
Gus Van Sant,
Uil Realignment 2020 Predictions,
Stressless Furniture Sale,
2020 Football Hobby Box,
Hawaii News Now Cheap Eats 2020,
Msi Ram Configuration,
Edward James Olmos,
Dear John Olivia Jeans,