:smile: I doubt that it is the tranny. That is a variable drive system. I have found that working on MTD LT's, that aftermarket belts just do not get it. MTD belt #'s for the that drive: 954-04001A and 954-0241A. I would pull the battery and the battery box, and check the drive pulley on the tranny. It has a serrated center hub, and I have found the teeth seared off. Also check the variable speed pulley, I have found them froze up. The tranny is a single speed unit, with forward, neutral and reverse and very seldom gives you any trouble.