AMC TRANS 21T X DANA 18/20

Advance Adapter

This Jeep transmission adapter to the Jeep Dana 18 / 20 transfer case is 1.012” in length. Adapter material is 356 T-6 heat treated aluminum alloy. Adapter kit includes a adapter casting, 21 spline x 6 spline spud shaft, gasket, seal, o-ring, fastening hardware, and adapter instructions.

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

The kit is designed for exclusive use with all 1980 & newer Jeep manual and automatic transmission that feature a 21 spline output shaft.

Required Options

716001 Large Hole Retainer or

716002 Small Hole Retainer

Bill Of Materials

• ADAPTER- D18/20 TO NEW PROCESS / 51-7700
• JEEP 21 TOOTH OUTPUT TO-6 SPL. / 52-8601
• T.C. GASKET/JEEP or TOY L/C / 716568
• SEAL-TH400/TH350 TO TLC AND 18/20 ADAPTERS / 716700
• LOCK WASHER 3/8 ZINC / 723704
• H.H.C.S. 3/8 -16 X 1-1/4 (GR5) zinc / 723722
• BOLT 3/8 -16 X 1.00″ SHCS ZINC / 723731
• NUT-NYLON LOCK 7/8 -16 / 728701