Long! Ford Explorer! Related DD help.

Sounds like the starter is plum worn out, remove the starter and I bet the shaft will wiggle side ways, shaft bearings or shaft is worn out.
I have jumped under a few car/trucks with a hammer (in park/emergency brake) on
And hollered try it know and hold the key on while I beat on the starter ..
Told them to drive it home and do not shut it off!! get a new starter :glasses7: