Heavy Duty NP231 Slip Yoke Eliminator Kit, Jeep 1987-Up

Rugged Ridge Heavy Duty NP231 Slip Yoke Eliminator Kit

This kit is a MUST if you installed a 2" or taller suspension lift in your 1987-2006 Jeep Wrangler (not needed for body lifted Jeeps). The kit fits all newer production NP 231 transfer cases (1987- up). A Slip Yoke Eliminator Kit (SYE) will eliminate the need to drop your transfer case in order to avoid drive train vibrations that are caused by taller suspension lift. The purpose of this kit is to replace the slip yoke portion of the NP 231 with a fixed yoke and CV-style drive shaft assembly. This is the most complete and strongest kit available.

The model NP231 transfer case is a compact, chain-driven transfer case manufactured by New Venture Gear (New Process Gear) in Syracuse, New York.
Since the early 80's, the model 231 has been used in many vehicles and is designated as follows:
NP231C = GM S-10, S-15 trucks & Blazers 1983 - 1991
NP231D = Dodge midsize and fullsize trucks
NP231J = Jeep Wrangler YJ & TJ, Cherokee XJ, Commanche MJ, and Grand Cherokee ZJ from 1988-03.

This transfer case was first introduced in Jeep Wranglers in 1988 after replacing a 1-year run of NP207 transfer cases. The Kit shown here is designed for all applications of the NP231J model. All "J" models of the NP231 are not created the same. There are internal differences among different year models and this kit has been designed to be compatible with each version. Our fixed yoke kit has been installed in hundreds of V8 equipped Wranglers (small block and big block) to date without a single shaft failure. Because of this success, the new output shaft carries a lifetime replacement warranty.

With this kit you need a Custom Driveshaft.

Replaces part number: 52231

Download PDF Instructions - 52231