Our TH400 to FSJ New Process transfer cases conversion makes for an absolutely strong and capable assembly both on-road and off-road. It remains one of our most requested automatic transmission to transfer case combinations.

The adapter is compact at only 1.4" in length. This adapter assembly is the shortest Turbo 400 adapter in the industry, providing a combined transmission and adapter length of only 25.9" (equivalent to an 18.9" manual transmission / bellhousing combination). The adapter itself is precision machined of aluminum alloy. The adapter is drilled for multiple clocking options and features a modular mounting and support base, ready to accept our industry standard urethane isolator mount, available in Related Products, below.

If you have an NP208 version output shaft TH400 transmission, and want that full 32 spline strength, this kit includes a 32 spline input gear for your NP208, 219, 228 or 229 chain drive transfer case in your 1980's FSJ Jeep. As such, this kit is not compatible with the Dana 300 transfer case.

Kit contents:

• Adapter
• New Process transfer case input gear, 32 splines
• Seal
• Seal spacer
• Gaskets
• Steel base foot mount
• Fastening hardware
• Instructions

These kits are for all years and versions of the popular HydraMatic 400, including Chevy, Buick and other GM, AMC Jeep, etc. and work with 2wd & 4wd versions.

Disassembly of the transfer case is necessary to replace the factory 23 or 31 spline input gear with this unit. It may be a good time to do a rebuild and replace the chain while you are into it.