Here's what is happening. The starter engages then, after the engine turns about 1/4 rotation, the damn starter lets go and grinds against the flywheel teeth. I started the car about 4 hours ago and it was fine. Now, this happens.
Here are the steps I've taken, nothing has worked yet:
-Turned the engine by hand to see if a tooth was broken off the flywheel.
-Noticed a loose ground strap coming off the battery. Fixed that.
-Had the starter out about two weeks ago when I rebuilt the tranny. There were two shims which went right back in the proper orientation. So, it's not that.
-Threw ratchet across the garage and ground MY teeth!
Any ideas guys? I would really appreciate it.
btw. The motor is a Gen 1 small block Chev with an OEM starter.
67 Firebird Hardtop.
96 Firebird Formula.