I disagree with this. Reason being is when I was a kid I installed a set of 410 gears in my Dad's 69 Charger, welded the spider gears for full posi etc. The Rear End made a Horrible whine, we drove it like that for a few months. Yes we POUNDED on that gear set even though it was whining like crazy and making ALL KINDS of noise.
I tore it apart and brought it to a rearend guy. He set it up properly and the whine was no more.
