Hey guys got a quick question. Flew from Wisconsin to Missouri to pick up my new truck.05 cummins. She's got a issue. When its cold with no trailer the mother seems to skip a beat it will sound like a small clank. Only does it when accelerating. Will do it 2-3 times then clean up. If I have my trailer hooked up (38 foot gooseneck) it will do it every time you take off. Any ideas on what it is?

 

Post a sound clip! Tranny is a? With the trailer on it needs more fuel to get going so could be an injector. Any codes?