I have a '73 FJ 40 with a locker in the rear. It has taken some time to get used to driving around corners with my 3 speed, stock F and locker, but I have also noticed that if I drive straight and let off the gas quickly, the rear of the truck shifts enough to require a slight correction in the steering to keep it straight. Does this sound right or do I have an issue in the rear springs and/or axel? Everything else is stock in the suspension (as are the springs) .