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. The best part of having gm thm 350 transmission rebuild repair manual on mini cd is having access to the pdf all the time. Th350c transmissions can be identified by an electrical connector on the driver side of the transmission above the pan gasket. This manual covers the procedures necessary to diagnose, repair andor overhaul the 350c transmission and the 350 transmission. This involves a process of elimination, usually starting from the simple, easytocheck items, then moving on to more difficult items in logical sequence. Complete th350 transmission package novak conversions. This transmission was a 3 speed automatic transmission developed jointly by chevrolet and buick. Automatic transmissions th350 transmission type free. Thm 400 transmission, and is found in both passenger cars and trucks. Transmission fluid, i used approximately 10 quarts to get to the fill line. This includes all text illustrations, tables and charts. Gm used the th350 in their vehicles starting in 1968 and was found in almost all rearwheel drive gm vehicles through 1984. However, over time the turbo 350 will develop problems, as with any type of.
Gm thm 350 transmission rebuild manual on cd 19691985 atsg. They are compact for the shorter jeeps, yet extremely versatile and durable. Th350 transmission parts, th350 transmission rebuild kits,sonnax transmission parts. 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. The th350 transmission was developed by general motors as a replacement for the twospeed powerglide transmission. 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 350350c atsg automatic transmission service group pdf free online. Superior k350 shift correction kit th350 automatic transmission th 350 thm 350 ebay. The shift pattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the powertrain control module pcm. Thm 350 vs 400 vs 700r4 car forums and automotive chat.
Every transmission gets carefully disassembled and is deepcleaned and inspected before assembly. Transmission rebuild manual, 350 350 c, thm, gm 6986 gm thm 350 transmission used in many 1969 to 1985 gm domestic vehicles. The th350 is such a popular transmission, and one of our most requested turnkey automatics. Gm thm 2004r transmission rebuild manual on cd 19801999. Download an electronic car service and repair manual with ova files downloading a small pdf file page 14. 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. How to identify a th350 transmission it still runs. This is a highly recommended upgrade for any th350 transmission.
The things that you will need to perform the transmission service on a th350 transmission is as follows. Tilt the transmission upward slightly during this procedure to keep the piston from coming out of the case and rolling out onto the shop. Thm 350 transmission rebuild part1 turbo hydramatic 350 transmission. The novak guide to the gm th350 automatic transmission. The 4l60e is a fully automatic rear wheel drive transmission. The turbo 350 was known as a durable transmission and was used extensively by gm. Superior k350 shift correction kit th350 automatic. Dip01 901j retaining clip, governor cover 6498 1 th700.
Th 350 introduction this kit can be installed in a few hours by carefully following directions. It comes as a performance mega package and also has a ss variant for those needing a higher horsepower and torque rating. 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. Jegs th350 performance transmission for chevy with short 6 in. 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. The level 3 th350 is good for motors up to 600 horse power. Th350 transmission tuning tech hot rod magazine hot rod. This kit comes with all the parts you could ever need to get your transmission up to the monster level. Repair, rebuild, technical, manual, th350, 350c, 350. Thm 350 c techtran manual automatic transmission service group atsg on. Turbo 350c th350c automatic transmission parts and diagram. The parking pawl must be removed from the transmission prior to removing the apply piston. Gm th350350c, 6986, performance transmission overhaul kits include. The th350 is an automatic shift, threespeed transmission.
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. This video covers the disassemble part of this unit covring what is the most common failures of it. Turbo 350 th350 automatic transmission parts diagram exploded view. This unit is basically a thm 700r4 with electronic controls added to the valve body. Abandoned chevelle will it run after 30 years and drive 600 miles. Th350 transmission parts,th350 transmission rebuild kits,sonnax transmission parts. Thm 350 c techtran manual automatic transmission service. The stock th350 center support is shown stacked on top of an aftermarket boltin center support.
Feb 21, 2016 this is part 2 ot the thm 350 transmission rebuild. Turbo 350 th350c thm375b transmission manual control lever. Now assemble the transmission using the non lockup input shaft and modified pump. It comes as a performance mega package and also has a ss variant for those. Turbine shaft identification forward and direct steel plate identification front servo components. Gm turbo 350 transmission rebuild troubleshooting guide troubleshooting is the stepby step process where you can logically diagnose a problem. It is widely considered to be one of the greatest of automatic transmissions ever built. If you have a gm car that falls within these model years, there is a good chance you have a th350. The turbohydramatic 350, commonly referred to simply as the turbo, was a threespeed automatic transmission first produced by general motors in 1969. 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. Component component description qtyk35900f oh kit 350c combo 6986 1k35900f1 gsk kit. Besides demonstrating an ability to withstand a moderate amount of pounding in stock condition. Gm th350 transmission assembly guide transmission building involves careful assembly.
Note that it has a notch in it to clear the parking pawl. Gm thm 700r4 transmission repair manual on cd 19821986. Gm thm 400 3l80 transmission rebuild manual 19691990. Pdf online thm 350350c atsg automatic transmission. Gm th350 350c, 6986, performance transmission overhaul kits include. Gm thm 350 transmission rebuild manual on cd 19691985. Download free thm 3l30 repair manual from can be simple quick and effective, but try one of their say ford service and. Replacing transmission fluid in a th350 built to drive. From research i did online i was expecting 6 quarts, but the transmission may have been low on fluid, i.
Youll find dvds that cover the teardown, inspection and. Component component description qtyk35900f oh kit 350 c combo 6986 1k35900f1 gsk kit. Basically in the newer gm nomenclature using car weight, th350 3l60 700r4 4l60 th400 3l80. Automatic transmission valve bodies th350 transmission type. Automatic transmission valve bodies th350 transmission. Gm turbo 350 transmission rebuild troubleshooting guide. This kit can also be used to convert the 350c lockup transmission back to the 350 nonlockup transmission. Thm 4l80e transmission found in trucks and vans, 1991up.
Superior k350 shift correction kit th350 automatic transmission th350 thm350. This transmission is part of the turbohydramatic series and also know by. Thm350 transmission rebuild part1 turbo hydramatic 350 transmission. Thm 4l60e electronic automatic overdrive transmission. Gm th350 performance parts manufactured inhouse by tcs products call. Make sure the engine, transmission, body and frame are properly grounded. Installation instructions transpak for turbo hydro 350. 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. We recommend using antiseize lubricant on all aluminum threads. 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. You will recognize the first half of the teardown, the. Turbohydramatic or turbo hydramatic is the registered tradename for a family of automatic transmissions developed and produced by general motors. Youll be able to print, swipe, expand and use any of the other features your phone, tablet or computer allows. The monsterinabox transmission rebuild kit for the th350 is available for gm vehicles.
Note how much longer the rollers are on the aftermarket part. The turbo 350 transmission was introduced beginning in 1969. If you have a gm car that falls within these model years, there is a good chance. 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. Covers assembly, disassembly, diagnosis, and troubleshooting. Automatic transmission, forward shift pattern, automatic valve body, chevy, th350, 4wd,1982 and later 208np transfer case, each 1 part number. Transmission rebuild manual, 350350c,thm, gm 6986 gm thm 350 transmission used in many 1969 to 1985 gm domestic vehicles. This is part 2 ot the thm 350 transmission rebuild.
Gm thm 700r4 4l60 transmission rebuild manual 19871993. 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. Turbo 350 th350c thm375b transmission manual control. Thm 350350c atsg automatic transmission service group. The th350 transmission is one of the most popular gm automatics for highperformance applications. The th350 transmission was introduced in the 1969 model year as the successor to the gm powerglide automatic transmission.
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