My buddy got an 03 HD with a 6 l. It was a plow truck and looked like it had been parked in the Atlantic. The guy had done nothing but plow snow and park it. I doubt it ever got washed. I wanted to kill my buddy when he showed me the Thing with only 80k in 2012. In spite of all that and abuse being ALL it ever saw this beast is still going strong today.. that's an honest to goodness real working truck. When you change that tranny oil pan make sure to get the right one. There's a couple different ones that easily get mixed up . It's a bit hard on gas but who cares with an occasional use hauler. I'd definitely run synthetic tranny oil in it and change out the Dexcool if I didn't know how old it was in there.