I have a 07 Mustang GT. I just changed the differential to 4.10, it had 3.31. I also changed the drive shaft since I had it out. I went to test drive the car and it has great response but when I take my foot off the gas, it sounds like it is whining. I cannot tell if it is from the differential or drive shaft. Does anyone know what I can do?
My gear guy is mint, comes on call and never had a problem.