Is rear noise normal

[Samhenley06]

I just swapped 14 bolt ff with 4.10 gears it roars at about 65mph and I feel some feed back when I release the throttle.

 

[HankScorpio]

Mine have all been pretty quiet.

 

[nvrenuf]

It should be quiet.

 

[83ChevyK5Blazer]

Mine have been quiet, has it been apart for a detroit or other drop in locker.

 

[Samhenley06]

I opened it up to check bearings and backlash, it was all good

 

[obijuank5]

If you went from 3.08 or something without vibes, your driveshaft is spinning faster now. It could very well be shaft angle vibes. If the pinion bearings are tight, my next suspect would be the angles.

 

[Samhenley06]

Ok. I got 8 degree wedges I'll see if that helps. Thanks I'll post when I know more