traction lok

I have a brand new trac-Lock with a 3.55:1 ring and pinion out of a Super 8.8 IRS. I pulled these out of a brand new unit I purchased off of summit and replaced with a spool and new gears. $265 for the set or best offer.

03 GT traction lok rear end. When turning, either direction, the rear makes a muffled grinding sound under acceleration (imagine two stones grinding on each-other in a circular motion), and a whining sound without acceleration (kind of like a dry door hinge but muffled). There is no sound until...