Ever since I had my new auburn pro series and motive 4:10 gears put in I have had nothing but trouble. It whines its but off and has a high speed vibration, now I am on my second set of each (carrier and gears, I had the shop where I bought them and had them installed warranty everything) but now I have same problem. We thought it was the tranny so my girlfriend, who works at a GM dealership, had her transmission guy tear it apart for free to see what was wrong, found out that the first and second blocker rings where bad and the main input bearing was shot. So had everything replaced thought everything was going to be fine, oh yeah and had u-joints replaced, but when tranny was put back in, the whine and vibration was still present. What next I was thinking so I called the shop and they told me to try replacing the axle bearings with bearing savers aka axle savers. Guess what… same whine and same vibration, and now I have major leak coming from left axle. One more thing, I had new lower control arms put on and sub-frames, pan hard bar, and pro kit springs, and had it aligned, now my vibration is at a lower speed then it was before.

Please anyone with any input or any ideas please respond. I am thinking of just selling everything the whole rear end assembly and buying a 9in or a 12 bolt.

 

Welcome aboard!
First, gears when set up correctly should not whine at all. I know, mine did the same thing, it was set up by a local McGuyver
Then, a rear end specialist did it for me correctly.
The vibration is definiately your stock steel driveshaft! Because it is now turning at a higher speed with the 4.10's than before, it can be felt at much lower speeds!
Get an aluminum driveshaft!

 

First, gears when set up correctly should not whine at all. I know, mine did the same thing, it was set up by a local McGuyver
Then, a rear end specialist did it for me correctly.
The vibration is definiately your stock steel driveshaft! Because it is now turning at a higher speed with the 4.10's than before, it can be felt at much lower speeds!
Get an aluminum driveshaft!

I relize that when gears are set up right they shouldn't whine, I was told that a rear end master was the one who did set up my rear.

As for the drive shaft, it has new u-joints and was sent out to a drive line specialist to be checked for balance. It was fine. So I was told driveshaft shouldn't be making the vibration.

Car comes out of the paint shop friday, right after it will then be towed to the drive line specialist shop to have them look it over.