Have the same problem on my wife's 81 Regal. I pulled the flywheel cover and turned the motor over a bit at a time until I came across some worn teeth on the ring gear. Most of the time the starter engages on the good teeth but once in a while they seem to contact the bad teeth giving that grinding sound.


1949 Chevy 1/2-Ton
"Sedgewick"
In the Gallery
1989 Caprice