This short shaft kit (also referred to as a slip yoke eliminator or SYE kit) shortens the transfer case allowing you to run a CV (double-cardan) style driveshaft that is 4″ longer than the factory driveshaft. This eliminates driveline vibration and friction generated by the factory slip-yoke design. It also improves the driveline angle and in most cases eliminates the need for lowering the transfer case which in turn raises the vehicle’s ground clearance. The main shaft included in this kit is 20% larger than the factory main shaft and will take the added torque generated by 4-to-1 low-range transfer case conversions, additional horsepower from the engine, and larger tires.
This kit fits all NP231 transfer cases. The NP231 transfer case is most commonly found on Jeep Wrangler TJ and YJ models and Cherokee XJ models with manual transmissions.