Hey everyone, so I just swapped out my rear end and drive shaft and put the stock rear gears and a brand new drive shaft. (71RR 727 Auto, 7290). The car runs great put when I hit around 75 mph, I hear this faint then strong ringing sound. Nearly identical to the sound a finger makes when traced around a rim of a glass. When I lift the gas, it stops. I can't figure out where the noise is coming from. I'm thinking the rear. Any help would be appreciated.