May be relative after you install it - I have a Detroit Locker in my 427 Cobra replica. I've noticed that if the air pressure in the rear tires is unequal side to side by as little as 3 pounds the rear will have a slight jerk to the right with every shift (Toploader 4 speed). Also, get ready for the little clunk as you go around corners and the locker unlocks and relocks. Other than that, you've got a great piece.