1994 Camaro Z28..
I'm restoring the car and replaced the rear end gearing differential from 2.73
to 3.2, in the original rear axle pumpkin. When I drive the car in speeds over
40 mph or even up to 70 mph, and I try to glide to deceleration I hear a very
loud whining noise like a jet plane is landing next to me. As soon as I
accelerate by pressing on the gas slightly the noise goes away. The person
that did this work for me says this is normal until the gears break in. Is that
true ??? I need to know as car work is still under warranty