Differential Problem?

Howzit. Ive got a 93 LX hatch. Ive had it for 3 months now. When I bought the car the rubber on the tires was almost new. The left rear still has plenty of tread left. But the right rear is beyond bald. I admit I am harsh on my tires but this seems abnormal. Is my diff. going out or already gone or am I going to be buying allot of single tires. The rear end is totally stock, gears everything. Thanks allot.
Alan

sounds like time for posi clutches and lighter shoes.

All the late FOX 5.0's came with posi's...sounds like your's need a rebuild.

It's nothing to be alarmed about though. As stated, it sounds like you're just spinning the one tire because of it.