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700R-4 X JEEP NP231 21 spl upgrading to 87-95 23 spl

SKU: 50-9103
$522.46
excluding shipping
GM 700R4 & 4L60 to Jeep NP231 (21 spline) Adapter Kit
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Advance Adapter

The 700R automatic transmission adapter to the Jeep New Process 231 is 1.50" in length. The adapter material is 356 T6 heat treated aluminum alloy and has a provision for a transmission mount. The adapter kit includes an adapter housing, new 700R4 output shaft, upgraded NP231 (23 spline) input gear, bearing, snap rings, o-ring, seal, gasket, fastening hardware and adapter instructions.

Transfer Case

The adapter assembly will fit the Jeep NP231 transfer case with a 21spline 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.

Transmission

This kit is designed for exclusive use with our new main shaft that fits the 700R-4 / 4L60 manufactured thru 1996. The overall case length of the transmission is 23.375", has a non-removable bell housing, and a 4 bolt square rear case. Late model 4L60E automatics will have a removable bell housing and a 6 bolt hex pattern rear case. The late model automatic will require an additional Advance Adapter to work with this kit (50-0405).

Notes:

  • On Jeeps 1995 & newer, New Process used a different planetary assembly. This late model transfer case can be identified by one of three case model numbers: 52097-894, 52098-361 & 52098-540.

Bill Of Materials

Products specifications
Transfer Cases Jeep New Process 207 (21 Spline Input)
Transfer Cases Jeep New Process 231 (21 Spline Input)
Transmissions GM 700R4 Automatic 2 Wheel Drive GM 1982-1989
Transmissions GM 700R4 Automatic 4 Wheel Drive GM 1982-1989
Transmissions GM 4L60 Automatic 2 Wheel Drive GM 1990-1992
Transmissions GM 4L60 Automatic 4 Wheel Drive GM 1990-1992
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