Found my mystery noise

[Rrent]

Flex plate wasn’t broken or bent, no loose bolts. Removed cover (started truck) no clunking sound, checked flex plate. Filed a bit off of the interior edge of the cover, reinstalled cover while lever towards the front of the motor.
I find it kinda strange there was nothing to”fix”.

 

[cucvrus]

Very nice Dr. Brent. I have seen this before and was going to mention it but I thought you had checked that. The M10 bolts do not fill the holes well in that cover. It is a sloppy fit. I have 2 new sheet metal 2 piece cover for a HMMWV. I put 1 on a CUCV a few years back just for fun and it fit perfect. Good job.