okay, today my mustang GT with 82,XXX miles on it had the engine service light go on while my dad was driving, it had recently had problems starting clean without grinding but now it grinds when i try to start it. My dad described it as idling in top gear, I'm looking to get it fixed soon but any i deas on the problem.

 

*edit: it doesn't always grind, just every so often

when i was driving and wasn't giving gas it would shake a

 

Get the code checked...