I bought an '02 61" Scag WB with the advantage deck bakck in the beginning of the summer. The mower has been great with the exception of having a really weak reverse. I had another 61" Scag WB before this one and it had a really strong reverse and it was a 1998 model. At first, both wheels had a weak reverse but then I had my guy adjust the tracking and raise the handle bars for me (I'm a tall guy) and that fixed the problem on one wheel. Now I have one wheel that pulls strong in reverse and another that is really slow. The weak wheel seems to be getting weaker and weaker the more I use it. Does anyone have any ideas for me to fix this? Could it be the hydros themselves? Maybe the wheel motors?