[WSSix]

To further confuse the situation, I've done numerous C5 rear ends. It was easiest to buy the rear end housing with gears already setup. I typically bought from DTE only. All I ever did was slide it onto the transmission. I used Red Line Oil in every one just as DTE said to. Not a single one made noise.

I've set up a few solid axles as well. Some made noise others made none. Luckily, none were terrible. My own car makes a little bit of noise. Not enough to bother me as I have no AC so the windows are down. I may change my mind once it keep the windows rolled up though.

I'm with the rest of you though, it really makes no sense that today, with all the advancements we have in manufacturing and technology in general, that gears still whine when set up according to the manufacturer's instructions. Yet, OEM gears that handle tremendous power don't make a sound. Many of these OEM cars make more power than I ever will too. Something doesn't add up.

It would be great to be able to talk to the person or people that actually set up OEM gears to know the process and how they compensate for different tolerances to achieve a quiet rear end. I think it would make for a good magazine/online article.