I ran over a raised concrete manhole. Car was making a subtle grinding noise when I gave it lots of gas. Took it to a nearby place. They said they fixed it, but the grinding persisted. Went to Autoplex on a recommendation from a neighbor. It took them a while to diagnose - turns out it was difficult to replicate on the lift. But they finally figured out what the issue was - the plastic heat shield was rubbing up against something (drive shaft maybe?). Great work and thankfully an easy and cheap fix once they figured it out. Trimmed the plastic away and I was out the door for about $50. Thanks!