What started my whole problem was the clutch hub nut coming loose 3 times and the last time I put it on to stay but I still had the bang because the damage was already done to the starter ring gear on the clutch basket. When I replaced the ring gear I also noticed the clutch hub bearing had a flat spot in it also and ended up replacing both the starter ring gear and the clutch basket to the tune of about $750. Replaced the clutch nut with a hardened one and had it bleeding red loctite when I hammered it on to 150ft# torque.
I have been bang free ever since I replaced these items over 2 years ago.
One other thing is do you have a rebuilt starter in there now? If you do, pm me for more info, it has to do with the starter gear itself
