The THM 350 transmission has a reverse, exhaust, pump pressure, governor, converter feed orifice, manual low control, intermediate clutch and more. For the THM 350C, introduced in 1980, General Motors put in a Torque Converter Clutch.
In order to give everyone the technical service information they need to effectively work on this tranny, ATSG released GM THM 350 Transmission Rebuild Repair Manual and reprinted in 2010 to add updates. Now, ATSG has converted the manual to PDF and put it on MINI CD.
This is a great resource. Among its pages are a line pressure chart, a range of parts identifying charts and an extensive table that reviews issues, possible causes and the number of ways to correct them. Procedures are broken down into numbered steps, walking you through even the most complex actions in an easy-to-follow manner. You’ll see how to (1) remove the intermediate clutch cushion spring, (2) take out the intermediate clutch faced plates, steel separator and a wave spring before (3) inspecting the composition and steel plates. You’ll learn that if the unit won’t leave first gear, you need to examine the governor assembly to see if there’s a sticking valve or a loose, damaged or worn gear.
The best part of having GM THM 350 Transmission Rebuild Repair Manual on MINI CD is having access to the PDF all the time. You’ll be able to print, swipe, expand and use any of the other features your phone, tablet or computer allows.
Subject: GM THM 350/350C Transmission rebuild instructions - 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985. | ATSG THM 350C CD