I was wondering what causes the gm flywheels to go bad. I was trying to explain it to the people i work with that its necessary to replace the flywheel and about how i was going to buy the single disk kits from the crank it up diesel guys. they think it rediculous to spend 1600 for a clutch they think i should get another stock clutch. so if any one has reason for why the flywheels are junk and idea of whow to explain let me know. thanks.