Who is running a aftermarket rear that is quiet?

[69x22]

Originally Posted by Vegas69

You may want to look at how your rear end is insulated through the bushings. To have 4 sets of gears be unacceptable leads me to think there is another problem with the rear end or your expectations are to high.

The first set made noise during acceleration, the middle two were on the coast side, now the last set is on the acceleration side between 45 and 50 mph. All of them had noticeably gotten worse with time. The rear has Delrin bushings, the car has full exhaust and a nice sound system. So my expectations maybe a little high.

Originally Posted by Vince@MSperfab

How was it set up? What was your backlash? How about your pattern?

It's hit or miss on the specs that come out. Had a few with no pre load at all. I even polished the gears on a few richmonds and it seemed to do the trick.

I set the GM gears up myself being they were used so I went with .011 on the backlash. The pattern was a nice oval low on the tooth. I plan on trying a pinion shim that will pull it out another .002. If that doesn't work I will try a set of Richmond gears.
I know it's a hit or miss with aftermarket gears. I'm just amazed that in 2013 the aftermarket can't produce gears that are for the most part "quiet". The gear manufacturers blame it on the people setting them up and the people setting them up blame it on the gears.