2nd try at posting I bought this 21" Snapper last month. It runs great except it has a wheel differential on it that the salesmen never told me about. If i would of known it had it i probably wouldnt of bought it in the first place. Who ever came up with this idea never thought about mowing on the side of a hill. How the wheel differential works is when one wheel has the weight shifted to one side or the other the wheel that has the weight goes dead. I guess the idea is that when you make a turn the inside wheel isnt supose to turn allowing for easier turning. DUMB DUMB!!! When you get on an incline of any degee the wheel that is supose to drive the mower is dead because the weight is shifted to it. and that means you are dead on the hill having to push it and when you do get it to engage it jerks and takes off. POOR DESIGN bottom line. Has anybody here taken off the wheel differential on a snapper or know how to? All the mechanics around here in my area (WV) dont have a clue or dont want to bother with it. It would be a good mower if it werent for the wheel differential.