I have a TORO FWD walk behind, three years old and it is in the shop again. First time, after 18 months the transmission went, so under warranty replaced. Then sixmonths later carburetor failed, in shop again ($80.00), now, after one year later the front driove wheels spin, but will not pull (I put her up on back wheels, engage drive and wheels spin, although they do stop momentarily and then re-spin). but will not pull on the ground (1/2 acre lot, flat and tall Fescue). Pulled cover off of belt drive and the top pulley is wobbling, very loose, so I need to replace that, but what say you on the drive mechanism? I am not a TORO dfan at present.