I got a screw in my tire the other day and it was too far on the outside of the tread to be repaired so I had to bite the bullet and buy a new tire. :willy: I still had about 50% tread left! Well, my question is this: the replaced tire was the driver's rear. Now that I have twice as much tread as the other tires, would it affect my rearend clutches at all? I do know that on some cars with posi rearend, if you put a donut back there, you can wear out your diff clutches in as little as 20 miles. Would the 1/4"-3/8", or so, added tread on the tire affect this????