I have a raptor sd 54 and having trouble keeping the drive belt on. As long as you are on level ground it's fine no problem but if you get one rear tire higher than the other, such as a good size bump or slope,o little and try to turn off comes the belt. Today I got the right rear tire on a little hump and tried to turn and this time broke the belt. Something can't be right with this I'M having a hard time keeping my grass cut.