8 3/4 gear set up help

You know, the gears in my car (4.30:1) whine on coast. Does not bother me really, just part of having 'gears' in your car.

Unless the noise is really bad and present all the time, (accel/decel) I'd run 'em. At this point, you are not going to cure any ills by doing the same thing over and over.