1980 suburban, stock 454, th400, drive train is untouched.
when im driving theres a few Situations where ( something ) happens and my flexplate touches the bendix
like hitting the has a little hard from a dead stop, shifting up an incline,and or creeping up my steep driveway.
it will also happen if im accelerating down hill and i hit the gas kinda hard.
i just had the flexplate replaced ( it was cracked )and its still doing it. ive ground off like 1/8off the starter gear and still does it. i had 3 shims between the block and one by one ( removing them ) nothing changed.
the starter is a hi torque starter because the stock gm starter doesnt fit for what ever reason