Left wheel is less responsive and is slower than right. Changed oil and bled the proper way (jacked up mower, opened free wheel valve, pushed controls back and fourth, etc). After noticing that the wheel still wasn't as fast as the other, I thought it was a parking brake issue, so I took the drum off, but that wasn't the issue. Tried turning the wheel shaft by hand and it wouldn't turn, so I took the right wheel apart and was able to turn the shaft by hand. My question is- if the right shaft will turn by hand, but not the left, does this mean there is something wrong with the left wheel motor? It feels like something is jammed up when the shaft is moving. Thanx.