GM 4L60E Transmission To NP231 23 Spline Transfer Case Fits 1987 to 2014 Wrangler and Unlimited;Fits 1984 to 2001 XJ Cherokee;Fits 1986 to 1992 MJ Comanche;Fits 1993 to 2004 Grand Cherokee;Fits 1997 to current GM 4L60E/4L65E 4 speed automatic transmission to the Jeep NP231 transfer case with 23 spline input s Advance Adapters Advance Adapters GM 4L60E Transmission To NP231 23 Spline Transfer Case - 50-0430 50-0430 Transmission Adapters