theres only about 3 parts that wear out on the shifter, the plastic cup, the knuckle on the selector rod on the back of the tranny and the rod that goes from the knuckle the the bottom of the shifter. optional parts, the seal for the selector shaft (it's about as big around as a quarter) output shaft seal (if not leaking leave alone, the selector shaft seal is usually the one leaking) flex coupler if it has one center bearing on the driveshaft and last but not least tranny mounts