700R-4 X JEEP NP231 23T (AX15)

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 23 spline 700R4 output shaft, 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 23 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.

The Advance Adapter kit is designed to fit Jeep New Process 231, 242, 247, 249, and 2410 Rock-Trac transfer cases.

Transmission

This kit is designed for exclusive use with the 700R-4 / 4L60 / 4L60E. The overall case length of the transmission is 23.375″, has non-removable bell housing, and a 4 bolt square rear case. Late model 4L60E automatics will have removable bell housing and a 6 bolt hex pattern rear case.

Bill Of Materials

• GM AUTO TRANSMISSION O RING / 716511
• GASKET-N.P.208 TRANSFER CASE / 716517
• SEAL CR#19466 / 716729
• ADAPTER- TH350 TO JEEP NEW PROCESS / 51-6800
• SHAFT- 700R4 OUTPUT TO JEEP 23 SPLINE / 52-9101
• GM 700R/4L60E NYLON BUSHING / 716082
• STUD BOLT 3/8 -16 X 2 LG B7 / 723711
• BOLT 3/8 -16 X 1.25″ SHCS ZNC / 723730
• 10mm-1.5THR X 40mm S.H.C.S. black oxide / 720046
• NUT 3/8 -16 PLATED GRD 5 / 723701
• LOCK WASHER 3/8 ZINC / 723704