adapter TH350 - Dana18/20, 6 splines

The GM TH350 adapter to the Dana 18 / 20 is a short 1.850". And the overall length of transmission and adapter is 23.35". The adapter material is 356 T-6 heat treated aluminum alloy and the adapter has a provision for a transmission. The adapter kit includes a adapter housing, new 4wd TH350 output shaft, 6 spline spud shaft, nylon bushing, bearing, snap ring, o-ring, seal, gasket, fastening hardware and adapter instruction.

Transfer Case

This adapter assembly will fit any Dana Spicer 18 / 20, Scout version with a 6 tooth female drive gear. The transfer case index to the new adapter will require an index retainer & sealed bearing. Please I.D. the transfer case bore size (3-1/8") small hole or (4") large hole for proper retainer. Additional information can be obtained in our on-line catalog, Jeep & Scout Vehicle Section: Transfer Case Information, Jeeps 1941-79.

Transmission

This adapter kit is designed for exclusive use with the 2wd GM TH350 automatic transmission. This GM automatic was commonly found stock in vehicles from 1969-81. It was used in both pickups and car applications. On 2wd transmissions, GM used three different tailhousing lengths. These lengths of the tailhousing are 6", 9", and 12". The output shaft length corresponds with these tailhousing lengths.