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GM Transmissions

by Terry L. Howe


GM

Transmissions
Transfer Cases

Jeep Trans

Upgrades
Factory Options
General


The low cost and high availability of GM transmissions makes them excellent fodder for a swap into a Jeep truck. A GM transmission makes more sense if your Jeep truck already has a GM engine or if you plan to swap in a GM engine. In the late 60s and early 70s, Jeep pickups and Wagoneers used the Buick 350 engine and the CJs used the Buick 225. If a transmission swap is planned for these vehicles, a GM transmission is the best bet.

Identification

SM465: The SM465 is the strongest of the heavy duty 4 speeds. It is a great transmission, but its unusual input bearing retainer size makes it most suitable for a Jeep with a Chevy engine.
SM420: The SM420 is the older of the GM heavy duty 4 speeds. It is an excellent transmission to use with your Chevy or Buick powered Jeep.
Turbo 350 Chevy tail shaft TH350: The TH350 is strong 3 speed automatic transmission used behind many V8 and V6 GM cars and trucks.
TH400: The TH400 is a heavy duty 3 speed automatic transmission used in many GM cars and trucks.
700R4: The 700R4 is strong 4 speed automatic transmission used behind many V8 and V6 GM cars and trucks.

Last modified Wednesday, 01-Dec-2010 08:13:49 MST


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