Advance Adapters NP231 Slip Yoke Eliminator Kit

This Heavy Duty Slip Yoke eliminator kit fits Jeep NP231 transfer cases. This kit features a new 1 3/8”-32 spline rear output shaft, 356-T6 heat treated aluminum alloy tailhousing, 1310 c.v. yoke (other styles of yokes available), bearings, fastening hardware, and detailed instructions.

Beware of Imitations
Use the photos below to determine if your kit is manufactured by Advance Adapters or not.

• Advance Adapters SYE Kit 1 (USA)
• Advance Adapters SYE Kit 2 (Sensor)
• Advance Adapters SYE Kit 3 (B)
• Advance Adapters SYE Kit 4 (Machined)
• Advance Adapters SYE Kit 5 (Nut)

Note: Advance Adapters has designed their heavy duty fixed yoke output shaft with the most current design 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 their kit, providing that the needle bearings are removed from the stock drive sprockets.

Transfer Case
Introduced in 1988, the Jeep NP231 is a part-time transfer case became the standard for XJ and YJ models. It was also used in six cylinder ZJ models through 1995. Chain driven with a 2.72:1 low range, it’s reliable even with more than stock horsepower applied.