I have a 32" Toro walkbehind (I believe the model number is 30252). I think the transmission is going bad. I just started happening last week. When I push the t-bar it will go really slow. After about 10 seconds it will go to normal speed, as long as it's not a slight incline. Steeper hills, it won't move. Slight inclines, it goes very slow. That said, I think it's the transmission. Any suggestions on where to get a new tranny? Also, any help on how to install one? Much Thanks.