NP231 Slip Yoke Eliminator Kit

Jeep model NP231 transfer cases have one glaring weak point. They use a slip yoke on the rear output shaft of the transfer case instead of having a fixed yoke and a drive shaft with slip splines. This design works fine on the street but once you have lifted your Jeep and installed bigger tires on it, the stress on the slip yoke or rear output shaft is often too much.

This kit includes everything to modify your transfer case! It features a new 1 & 3/8-inch, 32 spline rear output shaft, 356-T6 heat treated aluminum alloy tailhousing, 1310 CV yoke, bearings, fastening hardware, and detailed instructions.

Note:
This kit was designed based on the most current shaft found in the New Process Gear NP231. This current design shaft was introduced in 1997. Jeep vehicles using the early NP231 can still use this kit, providing that the needle bearings are removed from the stock drive sprockets. Also, this kit does require a rear CV drive shaft, which helps to prevent driveline vibration and the rear ouput shaft from breaking.

Rough Country's NP231 Slip Yoke Eliminator Kit - 50-7906