Well my snowblower let me down. Engine runs fine but the shift will not move out of 4th. Not to 5th or N or R. The machine would go forward and blow snow but at times was making a banging metal sound. Worked fine last spring. Belts are pretty new. I tried to use it but it took too much energy to hold it back and down. It needs to be in 1st or 2nd to do this snow. I do have a newer Craftsman 24" but that's for another day. Ideas?