My 2305 has developed a loud noise when I am running the 62" MMM. If the mower is on level ground, it runs well. If the ground is unlevel and the gauge wheel kick in, there is a loud noise coming from the left side. It sounds like a slip clutch on a combine to me. I wonder if there is something wrong with the gear box on the mower deck. I only have 30 hours on the tractor and mower. Any suggestions are welcome. Help!