I put an `02 10 bolt with 12k in my 90 firebird.
I installed it with the disc brakes. My car was originally drum.

I've been trying to fix my gear whine since installing it.
Tonight I figured I would jack the car up and run it in gear in the air at the same speeds I hear the whining while driving to either eliminate the tires and or figure out which bearing is shot.

What I found was both wheels turned together when the car was in gear and driving while the wheels where off the ground. Is this normal behavior for a torsen diff?

I also found that the passenger side was louder than the drivers side, but they both made a bit more noise than I thought they would. It almost seems as if the brakes are dragging.

Is there an adjustment I need to make to loosen up the rear brakes, and could this be my problem with hearing what I think is a bad wheel bearing/gear whine?

Right now I think its either both brakes dragging or I need both wheel bearings. Or the center diff/gears are just trashed.

Next step is to remove the tires and brakes and see what she does.

Any thoughts?

 

I'm no expert here, but wouldn't this be explained by having a posi with richmond gears?

 

Yeah it would except its a stock 3.42 gm gearset and a torsen diff...

I went to my mechanic today who said its pinion bearings.