The Rough Country NP231 slip yoke eliminator (SYE) kit converts the NP231 transfer case from a slip yoke rear output to a fixed yoke, allowing the use of a CV-style or double-cardan rear driveshaft. The factory slip yoke design limits the operating angle of the rear driveshaft — on lifted Jeeps, this causes driveline vibration and can lead to rear output shaft failure. The SYE kit eliminates these issues and is a required upgrade for any serious NP231-equipped Jeep build with significant lift.

Features & Benefits

• Converts NP231 from slip yoke to fixed yoke rear output
• Eliminates driveline vibration caused by excessive driveshaft operating angles on lifted builds
• Prevents rear output shaft failure under high-angle operation
• Required for proper driveline function on significantly lifted NP231-equipped Jeeps
• Must be paired with an extended travel rear driveshaft (not included)

Important Note

An extended travel rear driveshaft is required after installing this kit. The factory driveshaft cannot be reused.

Fitment

Jeep NP231 Transfer Case — Wrangler YJ, TJ / Cherokee XJ / Grand Cherokee ZJ and other NP231-equipped Jeep models