I have a 01 camaro with a Turbo 6.0, tci flexplate, pro yank 3400 converter, 4l80 using stock converter bolts everything was fine no noise only seen that the bolts hit cause transmission started slipping so pulled it for rebuild. What could cause this?

 

Would you like to explain that better? You might get some suggestions then.

 

Flex plate flexing and high converter pressure