GM 4L80ETransmission to Dana 300 21 Spline Transfercase Adapter Fits 1980 to 1986 CJ;Fits 1997 to current GM 4L60E/4L65E 4 speed automatic transmission to Dana 300 transfer case;21 spline input shaft Advance Adapters Advance Adapters GM 4L80E Transmission to Dana 300 21 Spline Transfer case Adapter - 50-0432 50-0432 Transmission Adapters