The constant stop and go mowing has pushed me past my tolerance level. I am not sure if it is related to being a hydrostatic transmission, the grade of my yard, or what, but this is my third lawn tractor (first hydro) and I have never experienced anything like this. Although it mows great, I cannot control the speed going downhill. Seems the momemtum of the mower picks up as I travel downhill, disengaging the transmission. Once it comes to a near stop, it re-engages and rares back with all its fury. It is the closest thing to riding a bull in a rodeo. I contacted a dealer and explained my problem. He said he has heard of this (coasting) happening but not sure if it is a defect or not. Another issue, on day two of ownership, after pulling a 36" roller for a 1/2 hour, it would not move in forward or reverse. After letting it cool down for about an hour (while I was on the phone with HD) it then worked fine. Thought it may have overheated. I asked the tech at the local dealer about this, and his suggestion was to pull the roller for 20 minutes and let the mower cool down for 10 minutes. I was a little amazed based on the fact that my $300 dollar MTD had no issues pulling this roller for the 2 acres of mowing. Any suggestions on what to buy in replace of?