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GM TH400 Automatic Transmision to Jeep Dana 18/20 Transfer Case (with 10 spline drive gear) Adapter Kit

Your Price: $534.55
Retail Price:$556.44
Your Savings:$21.89(4%)
Part Number:AA-50-1400

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Advance Adapters

The TH400 adapter to the Dana 18 / 20 is 2.875” in length. And the overall length of the transmission and adapter is 27.125”. Adapter material is 356 T-6 heat treated aluminum alloy and the adapter has a provision for a transmission mount. The adapter kit includes an adapter housing, new TH400 out put shaft, 10 spline spud shaft, bearing, snap ring, gaskets, seal, fastening hardware, and adapter instructions.

Transfer Case

This adapter assembly will fit any Dana Spicer 18 / 20 version with a 10 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.


This adapter assembly is designed for exclusive use with the GM TH400 transmission, 2wd or 4wd version. The adapter housing has been drilled to accept the AMC TH400 rotation.