Having a problem, start the truck and there is a metallic noise. Shut it down and start again, same thing. Call for a tow, tow truck shows up, start the truck again and the noise is still there. Put in reverse to back up and the noise stopped immediately. Drove the truck home and parked it in the garage, went our the next day same problem again. Strter is about 18 months old. Any ideas? Thank you.