GM NP241

The NP241 transfer case is a chain driven transfer case in an aluminum case used in 1988+ Chevy and GMC trucks. The GM version comes in drivers and passenger drop versions. The K series trucks use a drivers drop version. This transfer case is also used in Dodge trucks and Ramchargers after 1988.

A neat thing about the GM NP241 is the input shaft can be swapped into a Jeep NP231 for a low buck 700R4 adapter. The GM NP241 uses a different spline count than the Jeep NP231, but that is reported to be the only difference.