GM TH350 Transmission To Dana 300 or NP231 23 SplineTransfer Case Adapter Fits 1980 to 1986 CJ with Dana 300 transfer case;Fits 1987 to 1995 YJ Wrangler with 23 spline NP231;Fits 1973 to 1985 GM TH350 4WD transmission;Some applications require driveline modifications;Includes all mounting hardware Advance Adapters Advance Adapters GM TH350 Transmission To Dana 300 or NP231 23 SplineTransfer Case Adapter - 50-6304 50-6304 Transmission Adapters