At the end of last fall I threw my chain and took a decent chunk out of the case. I had the case welded, looks great from the outside and the inside was completly flush with the rest. I put the motor back over the winter and it fired right up. Went to put it into reverse and wouldnt shift into first. It is almost like the shaft isnt engaging into the drum. Not very expirnced with transmissions on these things. Any one have ideas? Just want to get this wheeler going.