Hi all I have recently purchased a imola yellow s4 with stage 3 mods 620 bhp.
It seams to have a whine from around 50 to 70 mph but only when on the throttle if you back of it's not there and it's not there below 50 or over say 75.
Im guessing it's the rear diff both bearings have been changed
anyone else had this issue?
im also looking for info on an up rated diff if I'm going to change it I may as we'll get a better one. Is rs6 diff the same ??
Thanks in advance