*Some models may require mode fork shift rail to be shortened. Add the Slip Yoke Eliminator to the Wranglers NP231 transfer case and solve a couple of problems such as changing a damaged drive shaft on the trail without losing all the lubricant, or eliminating the noise, vibration and wear that develops when the NP231 is lifted. Another benefit is the beefier rear output shaft that provides a 54% increase in torque capacity. Other kit components include: specifically designed aluminum rear output housing, bearings, seals, snap rings, bolts and instructions. **CV rear drive shaft is required.
Advance Adapters got its start in Downey, California in 1971 with a single adapter mating a Muncie car 4-speed to a Jeep Dana 18 transfer case. Eventually headers, overdrives, motor mounts and linkage brackets were added to the offerings to complement their core adapter components. When interest in rock crawling spiked in the mid-1990s, Advance Adapters offered low ratio transmission swaps then switched gears into the ultra-low gear transfer case arena. Today, the company is based in Paso Robles, California and their engine and transmission conversions for Jeeps are in kit form and sold as individual components. Shop Advance Adapters Now