Manufactured by Teraflex. This TJ/LJ | YJ | XJ NP231 Short Shaft Kit increases the rear driveshaft length by 4 inches, which eliminates the need for a Transfer Case Lowering Kit in most cases. Also includes a larger output bearing and rear housing. Fits: � TJ Wrangler � LJ Wrangler Unlimited (long-wheelbase) � YJ Wrangler � XJ Cherokee Replacement Parts: � NP231 Short Shaft Kit Replacement Output Housing Seal (# 231104). � NP231 Short Shaft Kit Replacement Rear Output Yoke (# 3244404). � NP231 Short Shaft Kit Replacement Output Yoke Flange Nut (# 231112). Notes: � This kit must be used w/ a CV style (double cardan) driveshaft. � Fits NP231-J transfer cases only. Install Time: 5 Hours