1985 Ford Bronco

when my son starts his Bronco, it grinds and is so loud that it can wake the dead. any suggestions to the cause and repair of this. it is a 351W motor and an automatic transmission. thanks

Does it grind AS it’s being started, or when it’s running?

it grinds as it is trying to start.

That’s NOT the engine…but the starter…Replace the starter.