Dealership Service Rant (non mopar)

I'd not only bring the socket, but the receipt from the independent shop and make them pay for it. I'd also get a few free oil changes out the deal. Talk to the dealership owner and tell them you're going to call the news station and put a big ad up if they don't remedy the situation. Explain to them that they will probably lose all your/family/friends future business in sales/service if they don't rectify this problem (maybe ask if their mechanic wants his socket back).

This is exactly why I pay bills with credit cards. That way I can refute payment if the item/service isn't up to code.

I'd also go to the independent shop and explain to them what you found and make them refund your money since they didn't diagnose the problem correctly in the first place.

Just my $0.02.
-Travis-