The Advance Adapters 43-spline adapter kit (SKU 50-9906) is built for anyone swapping in a 6.2L HEMI-based ZF 8HP automatic transmission — specifically the high-output 8HP95 pulled from a Ram TRX or a Jeep Grand Cherokee Trail Hawk/Track Hawk. These high-output transmissions use a 43-spline output shaft, which doesn't match up with standard transfer case or driveline input splines, and that's exactly the mismatch this kit is designed to solve.
At the heart of the kit is the 5.7/6.2 8HP70/8HP95 adapter housing (52-9902), which bridges the transmission output to whatever's downstream in your build. Paired with it is a JP 43F x JP 23M shaft (5.76" overall length), which handles the actual spline conversion — stepping down from the transmission's 43-spline female output to a 23-spline male output that's compatible with common transfer case inputs.
What's included:
- 5.7 and 6.2 8HP70/8HP95 Adapter Housing (51-9905)
- Shaft, JP 43F x JP 23M, 5.76" OAL (52-9902)
- Sealed Bearing 209RS (716308)
- Snap Ring, T350/T400 (716450)
- True Arc Snap Ring (716456)
The sealed bearing and matched snap rings round out the kit so the shaft is properly supported and retained in the housing — no hunting down bearing and retainer specs separately.
This is a purpose-built solution for a specific swap scenario: if you're running (or planning to run) a high-output 8HP70/8HP95 out of a TRX or Trail Hawk and need to mate that 43-spline output to a standard transfer case, this adapter kit handles the conversion in one part number instead of piecing it together from individual components.