However, over time the turbo 350 will develop problems, as with any type of. The 4l60e is a fully automatic rear wheel drive transmission. Tilt the transmission upward slightly during this procedure to keep the piston from coming out of the case and rolling out onto the shop. Our atsg gm thm 4t60 440t4 transaxle update handbook covers engineering changes that have occurred from 1984 to 1989, parts affected by the change interchangability, part numbers, sprocket ratios and converter stall speeds. Gm turbo 350 transmission rebuild troubleshooting guide troubleshooting is the stepby step process where you can logically diagnose a problem. Transmission case and external parts transmission case and external parts legend control valve body assembly control valve body assembly legend internal components internal components legend oil pump parts with legend geartrain components. Thm 4l80e transmission found in trucks and vans, 1991up. Download an electronic car service and repair manual with ova files downloading a small pdf file page 14. The monsterinabox transmission rebuild kit for the th350 is available for gm vehicles. The th350 transmission is one of the most popular gm automatics for highperformance applications. It is widely considered to be one of the greatest of automatic transmissions ever built.
Thm 350 350c atsg automatic transmission service group pdf free online the turbo hydramatic 350c transmission, first introduced in model year 1980, is a modified version of the previous thm 350 transmission, with the addition of a torque converter clutch. 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. Every transmission gets carefully disassembled and is deepcleaned and inspected before assembly. A thm 200 transmission, produced between 1975 and 1987 after the 1973 opec oil embargo, gm developed a lighterduty version of the thm350 with lightened materials primarily alloys in place of ferrous materials e. Thm 350 transmission rebuild part1 turbo hydramatic 350 transmission. Automatic transmissions th350 transmission type free. This transmission is part of the turbohydramatic series and also know by. Component component description qtyk35900f oh kit 350c combo 6986 1k35900f1 gsk kit. The th350 transmission was developed by general motors as a replacement for the twospeed powerglide transmission. The shift pattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the powertrain control module pcm. Thm 350 c techtran manual automatic transmission service. Transmission rebuild manual, 350350c,thm, gm 6986 gm thm 350 transmission used in many 1969 to 1985 gm domestic vehicles. Abandoned chevelle will it run after 30 years and drive 600 miles.
This includes all text illustrations, tables and charts. Turbine shaft identification forward and direct steel plate identification front servo components. The things that you will need to perform the transmission service on a th350 transmission is as follows. Thm 350 vs 400 vs 700r4 car forums and automotive chat. Th350 transmission parts,th350 transmission rebuild kits,sonnax transmission parts. Turbo 350 th350 automatic transmission parts diagram exploded view. Superior k350 shift correction kit th350 automatic. This booklet contains general description and overhaul procedures necessary to repair, overhaul or service the thm 400 transmission, and is found in both passenger cars and trucks. Thm350 transmission rebuild part1 turbo hydramatic 350 transmission. Gm th350350c, 6986, performance transmission overhaul kits include. Superior k350 shift correction kit th350 automatic transmission th350 thm350. This is part 2 ot the thm 350 transmission rebuild. Gm th350 350c, 6986, performance transmission overhaul kits include.
The th350 is such a popular transmission, and one of our most requested turnkey automatics. You will recognize the first half of the teardown, the. Transmission rebuild manual, 350 350 c, thm, gm 6986 gm thm 350 transmission used in many 1969 to 1985 gm domestic vehicles. Installation instructions transpak for turbo hydro 350. This transmission was a 3 speed automatic transmission developed jointly by chevrolet and buick. Gm turbo 350 transmission rebuild troubleshooting guide. Component component description qtyk35900f oh kit 350 c combo 6986 1k35900f1 gsk kit. Automatic transmission valve bodies th350 transmission.
Gm used the th350 in their vehicles starting in 1968 and was found in almost all rearwheel drive gm vehicles through 1984. The th350 transmission was introduced in the 1969 model year as the successor to the gm powerglide automatic transmission. Th 350 introduction this kit can be installed in a few hours by carefully following directions. The turbo 350 transmission was introduced beginning in 1969. Gm thm 700r4 4l60 transmission rebuild manual 19871993.
Gm thm 350 transmission rebuild manual on cd 19691985. Turbo 350 th350c thm375b transmission manual control. It comes as a performance mega package and also has a ss variant for those needing a higher horsepower and torque rating. This kit can also be used to convert the 350c lockup transmission back to the 350 nonlockup transmission. Now assemble the transmission using the non lockup input shaft and modified pump. Gm thm 400 3l80 transmission rebuild manual 19691990. If you have a gm car that falls within these model years, there is a good chance you have a th350. Covers assembly, disassembly, diagnosis, and troubleshooting. This manual covers the procedures necessary to diagnose, repair andor overhaul the 350c transmission and the 350 transmission. Thm 350350c atsg automatic transmission service group. How to identify a th350 transmission it still runs. The turbo hydramatic 350c transmission, first introduced in model year 1980, is a modified version of the previous thm 350 transmission, with the addition of a torque converter clutch. From research i did online i was expecting 6 quarts, but the transmission may have been low on fluid, i. The turbo 350 was known as a durable transmission and was used extensively by gm.
Th350 transmission parts, th350 transmission rebuild kits,sonnax transmission parts. The turbohydramatic 350, commonly referred to simply as the turbo, was a threespeed automatic transmission first produced by general motors in 1969. Gm thm 350 transmission rebuild manual on cd 19691985 atsg. Complete th350 transmission package novak conversions. Automatic transmission, forward shift pattern, automatic valve body, chevy, th350, 4wd,1982 and later 208np transfer case, each 1 part number. The best part of having gm thm 350 transmission rebuild repair manual on mini cd is having access to the pdf all the time. These transmissions mate a threeelement turbine torque converter to a simpson planetary geartrain, providing three forward speeds plus reverse the turbohydramatic or turbo hydramatic thm series was developed to replace both the original. Transmission fluid, i used approximately 10 quarts to get to the fill line.
The level 3 th350 is good for motors up to 600 horse power. Gm th350 transmission assembly guide transmission building involves careful assembly. Oct 29, 2015 tilt the transmission upward slightly during this procedure to keep the piston from coming out of the case and rolling out onto the shop. Download free thm 3l30 repair manual from can be simple quick and effective, but try one of their say ford service and. Make sure the engine, transmission, body and frame are properly grounded. Basically in the newer gm nomenclature using car weight, th350 3l60 700r4 4l60 th400 3l80. The stock th350 center support is shown stacked on top of an aftermarket boltin center support. We recommend using antiseize lubricant on all aluminum threads. Repair, rebuild, technical, manual, th350, 350c, 350. This unit is basically a thm 700r4 with electronic controls added to the valve body. Youll find dvds that cover the teardown, inspection and. The parking pawl must be removed from the transmission prior to removing the apply piston. This involves a process of elimination, usually starting from the simple, easytocheck items, then moving on to more difficult items in logical sequence.
Thm 350 c techtran manual automatic transmission service group atsg on. The thm 400 transmission was first introduced in 1964 and was used through the 1990 model year with some engineering changes that occured during that time. Superior k350 shift correction kit th350 automatic transmission th 350 thm 350 ebay. Note how much longer the rollers are on the aftermarket part. The th350 is an automatic shift, threespeed transmission. Transtech paper and rubber kit with sealing rings, seals, new steels not tumbled and alto red friction clutches, heavy duty kevlar front band, filter and popular bushings and washers. This kit comes with all the parts you could ever need to get your transmission up to the monster level.
Turbo 350c th350c automatic transmission parts and diagram. Pdf online thm 350350c atsg automatic transmission. They are compact for the shorter jeeps, yet extremely versatile and durable. Th350 transmission tuning tech hot rod magazine hot rod. If you have a gm car that falls within these model years, there is a good chance. Gm th350 performance parts manufactured inhouse by tcs products call. Note that it has a notch in it to clear the parking pawl. Jegs th350 performance transmission for chevy with short 6 in. The novak guide to the gm th350 automatic transmission.
Turbohydramatic or turbo hydramatic is the registered tradename for a family of automatic transmissions developed and produced by general motors. Although they were both under the general motors umbrella, at the time they acted as completely separate entities, whereas now the developers at general motors powertrain work only for gm, not chevrolet or buick. This video covers the disassemble part of this unit covring what is the most common failures of it. Thm 350350c atsg automatic transmission service group pdf free online. Besides demonstrating an ability to withstand a moderate amount of pounding in stock condition. Youll be able to print, swipe, expand and use any of the other features your phone, tablet or computer allows. Turbo 350 th350c thm375b transmission manual control lever. Gm thm 2004r transmission rebuild manual on cd 19801999. Thm 400 transmission, and is found in both passenger cars and trucks. It comes as a performance mega package and also has a ss variant for those. Dip01 901j retaining clip, governor cover 6498 1 th700.
Replacing transmission fluid in a th350 built to drive. Th350c transmissions can be identified by an electrical connector on the driver side of the transmission above the pan gasket. This is a highly recommended upgrade for any th350 transmission. Gm thm 700r4 transmission repair manual on cd 19821986. Automatic transmission valve bodies th350 transmission type. Thm 4l60e electronic automatic overdrive transmission. Feb 21, 2016 this is part 2 ot the thm 350 transmission rebuild.
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