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.
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