Install a new O-ring (A) on the input shaft (mainshaft) speed sensor (B), then install the input shaft (mainshaft) speed sensor in the transmission housing.
Install a new O-ring (C) on the output shaft (countershaft) speed sensor (D), then install the output shaft (countershaft) speed sensor with the speed sensor washer (E) (only for K24Z3 engine model).
NOTE: The speed sensor washer is equipped on K24Z3 engine model; R20A3 engine model do not have a speed sensor washer.