Rearend Whine after rebuild???

[chaztruett]

Just had rear end rebuilt with new everything. Noticed that through all gears, (speed related), there is a extremely high pitched whine. (Sounded like alternator whine on radio) Not real loud but noticeable. Took it back to shop they tore it back apart, replaced all bearings, and still have the whine. They do a 500 mile inspection and told me to go ahead and drive it and will relook at that time.

Used all Yukon parts and an Auburn Posi.

We did not replace wheel bearings as they were just done about 4000 miles ago. Axles are worn. Using Axle saver bearings.

Im almost wondering if it could actually be from 700r4???

Only occurs in gear and is constant while accelerating. Not while coasting. i.e. if you trow into neutral no noise.


Thoughts?

thanks
tt