A technical write up of Turbosupras on the Toyota R154. The Toyota R154 Specs Toyota Motor Corporation’s R series is a family of 5-speed RWD/4WD transmissions found in the MKIII Supra Turbo, Toyota Crown, Toyota Chaser Tourer V, Toyota Mark II Tourer V, Toyota Cresta Tourer V, and Toyota Soarer (turbo) up to 2004.  The