Hi i am posting on here for the first time so thanks for any help in advance. My Dad gave me a 1995 Toro/wheelhorse 1544 HXL with a Hydrostatic trans it had been sitting behind his garage under a tarp for the last 10 years or so. He parked it and bought a new mower because it started leaking oil. The bolts that held the bottom pan of the engine had worked loose. I took the engine out removed the bolts and put lock washers on them and tightened them down. This cured the oil leak, but my problem is this thing goes great forward but will not do anything in reverse could anyone give me an idea of what the problem could be?