GM TH350 Transmission To Dana 18/20 Transfer Case Adapter Fits 1941 to 1979 CJ;GM TH350 3 speed, 2wd automatic transmission to the Jeep/Scout Dana 18 and 20 transfer case;Transfer Case: Jeep Dana Spicer 18 or 20 (6 spline input);Transmission: GM TH350 (2wd) Advance Adapters Advance Adapters GM TH350 Transmission To Dana 18/20 Transfer Case Adapter - 50-3000 50-3000 Transmission Adapters