Adapting the SM420
to
Jeep Transfer Cases

The GM SM420 is a popular transmission for the Jeep transfer cases, listed below:

Dana Spicer Model 18 (Jeep & IH, 1941-1971) Dana Spicer Model 20 (Jeep & IH, 1962-1979) Dana Spicer Model 300 (1980-1986) New Process 208, 219, 228, 229 (1980-1991) New Process 207 (1984-1988) New Process 231 (1988-2006) New Process 242 (1987-present) New Process 241OR (2004-present) Aftermarket Versions (Stak, Atlas)