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Jeep T98 to Jeep NP231 21 Spline Transfer Case Adapter

On sale $457.00
Retail Price:$529.64
Your Savings:$72.64(14%)
Part Number:AA-50-7506
Advance Adapter

Adapter kit 50-7506 is designed to fit the Jeep version of the T-98 to Jeep NP231 transfer case with short 21 spline input shaft. The adapter length is 3.25" and is manufactured using 356-T6 heat treated aluminum alloy. The adapter has a built-in transmission mount provision for our heavy duty mount p/n 716008. The adapter assembly includes an adapter housing, new T98 main shaft that is 21 spline, snap ring, gasket, seals, fastening hardware and adapter instruction.


The adapter kit is used exclusively with the Jeep version T98 4 speed manual transmission. Click on the link for detailed T98 description and history.

Transfer case

The adapter assembly will fit the Jeep NP231 transfer case with a 21 spline input shaft. Introduced in 1988, the Jeep NP231 is a part-time transfer case became the standard for XJ and YJ models. It was also used in six cylinder ZJ models through 1995. Chain driven with a 2.72:1 low range, it’s reliable even with more than stock horsepower applied.

Note: The input shaft should measure 1.19” from the face of the transfer case.