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Tom Woods Custom Built Driveshaft with S Spline and Rugged Ridge SYE Kit

The Jeep NP231 is one of the most commonly used transfer cases today. Itis a chain-driven, planetary designed gear box with a low ratio of 2.72 to 1. For the average 4-wheeler, this is a good transfer case.

One of the biggest faults of this transfer case is the overall length. At 20+ inches, thiscreates an extremely short rear driveshaft in the Jeep YJ & TJ Wranglers.

This short rear driveline becomes even more crucial when the vehicle is lifted or a transmission swap is performed. In addition, when a lift kit is installed, larger tires are usually the next upgrade.

Strength and driveline angle of the output shaft then becomes a concern.To make the NP231 better suited for these upgrades, Rugged Ridge has designed their Fixed Yoke kit with the best features available.

They manufacture a new one-piece tail housing that will add 3-1/2 - 4" to your rear driveline length on a YJ, and up to 6" on a TJ. This will allow you to obtain a better driveshaft angle and eliminate drivelinevibrations. We also manufacture a new 32 spline output shaft that is over 50% stronger than stock. This kit, along with a new 1310 series C.V. yoke, makes the NP231 a better transfer case for trail use. A full set of installation instructions isprovided to assist in the installation of this kit.