TH400 X JEEP DANA 18/20-6 SPL

Advance Adapter

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, 6 spline spud shaft, bearing, snap ring, gaskets, seal, fastening hardware, and adapter instructions.

Transfer Case

Stock 6 spline 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.

Stock 10 spline transfer case: This adapter assembly will also 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.

You will need to purchase a new 6 spline drive gear, J0809297. This *20 Degree pressure angle gear fits model 18 transfer cases with 2.46:1, w/ T14 transmission, 1 ¼” intermediate shaft CJ with Buck V6 (68-71).

If you have a Jeepster, you will need J5354506. This is a 17 Degree pressure angle gear: Model 18 transfer cases with 2.03:1, w/ T14 transmission, 1 ¼” intermediate shaft Jeepster/CJ (67-74).

Transmission

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.

Required Options

716001 Large Hole Retainer or

716002 Small Hole Retain

Bill Of Materials

• ADAPTER- TH400 TO JEEP / 51-0600
• STUD BOLT 3/8 -16 X 2 LG B7 / 723711
• H.H.C.S. 3/8 -16 X 1-1/2 gr. 5 zinc / 723723
• NUT-NYLON LOCK 7/8 -16 / 728701
• SEAL-INPUT SHAFT ATLAS / 300500
• NUT 3/8 -16 PLATED GRD 5 / 723701
• LOCK WASHER 3/8 ZINC / 723704
• SNAP RING (T350 / T400) / 716450
• GM T400/4L80E 862-4709 GASKET / 716510
• T.C. GASKET/JEEP or TOY L/C / 716568
• SHAFT- SPUD GM 27TF X JP 6TM / 52-1300
• SHAFT- TH400 OUTPUT / 52-3200
• SEALED BEARING 209RS / 716308