I was on my 2002 GW/California Sidecar trike doing 65 and started getting a small vibration. Then about 30 seconds later a violent vibration happened. The speedo went back and forth while I was pulling over. Put it in neutral and then put it back in 1st. Sounded like a thrashing machine. Terrible grinding noise. Had to call for tow to a town bout 45 miles away. I was 125 miles from home. Had to go back the next day with trailer to pick up and take home. Still makes terrible noise and wont engage trany. Can anybody guess what's wrong before I take it to a Honda dealer?