I am looking at a used Exmark Metro 36" belt drive with TriVantage Floating Deck (FC420V engine) and want to see if anyone can tell me what could be wrong with the reverse on this mower. The transmission is a Tecumseh Peerless (same used on most belt drive mowers). When the selector is placed in the reverse position the transmission turns but the mower will not backup, neutral and all forward gears work fine. This mower appears to have very little use, but will need some TLC to get it back to a reliable machine. It appears to be 6-8 years old but I am not sure since tag is missing from carrier frame.