I just got done swapping in an 8.8" with an auburn lsd and 3.55 gears that I got used into my 93. I added SVE upper and lower control arms and a Drake musclecars aluminum girdle with the bearing load bolts. Granted this is the first time running the car with this rear & gear setup but yesterday I took it to work and noticed a bit of whine at highway speeds (45-55 and 70+). I know for a fact the gears are not OEM Ford, I want to say they are US Gear...BUT if I had torqued the bearing load bolts on the cover too much could this cause the gears to whine? I know it's entirely possible that some gears just aren't as quiet as others, and of course I know that maybe they were not setup properly to begin with.