Put the car in reverse before you start it and if you need to go into reverse another time shut the car off again, put it into reverse and re-start the car. wink Then FIX ALL OF THE SUGGEST ISSUES as explained by the knowledgeable members here and have a good laugh at what I just suggested. It won't grind with the engine off because both the input shaft and output shafts are stationary or "synchronized". As pointed out by those in the know the input shaft is turning too fast or much faster than the output shaft.