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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.

NV4500: The NV4500 is the ultimate manual transmission for a Jeep that sees street and trail driving. Chevy has used the transmission since the mid 90s.

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.

NP435: The Chevy version of the NP435 is geared the same as the Ford and Dodge version of the NP435.

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.

Powerglide: The Powerglide is strong 2 speed automatic transmission used mostly in the 60s in cars. There is a lot of aftermarket support for these transmissions and they are very short.