Grinding noise in park or neutral

Yes. Starter is not disengaging. Whatever it is it keeps burning up the starters.I tried another ignition switch but never solved anything. Ill try the relay. Thanks!

Replaced starter and ignition switch but never solved anything. Never had a chance to check relay in the fuse box yet. That's my next move. Anything else this could be?

Whatever it is it's sending power to the starter when the ignition is in the run position when it shouldn't be. Is there a diagram on how to check the switch with a meter. Thanks!

Thanks! I'll check it out

With key on I assume?

Thanks!I try it

Working today but be trying it tomorrow. Any chance that it could be the flywheel?

Noise is not there in drive or reverse. But I can't see flex plate/flywheel causing it to start with key in run position. That I can't understand. I replaced the switch but never replaced the ignition cylinder. Is it possible it could be the cylinder and not the switch? Or may e replace both. It starts in run position and you hear the grinding noise but when you put it in drive or reverse it will go away but if you put it back in park the grinding comes back. Im trying what you suggested tomorrow. I'll let ya know my findings but in all honestly I'm ruling out flex plate because the vehicle starts in run position so it's sending voltage and causing starter to crank and vehicle to start when it's not suppose to. Thanks!

Hi, I have the exact same problem! Just payed $1600 to have the starter motor and the ignition barrel changed by my local hyundai dealer. The car is still doing the same thing! Could you please tell me if you know what the problem is before they make me pay more money for no reason :(

Have the same problem with a 2004 Chevrolet Suburban. Started after mechanic replaced shift cable. Replaced starter, and ignition/start switch. Same problem. New transmission installed (unrelated) and new torque converter. With tranny install, new flywheel and the mechanic is asking for another starter (third in 12 months) and shim plate. Does not make sense to me because loud mechanical clatter like metal plate in fan blades goes away in D, 1, 2, 3 (all conditions where neutral safety switch is engaged). I can't imagine the solenoid is bad on 2 starters in a row. I'm thinking of a bad relay or welded wire. Is it more likely that it really was a bad flywheel runing starters? I'll let everyone know what we figure out.