This is a two fold question. First, what is the difference between a 2500 and a 3500 (single wheel) gas burner 4x4? I have seen some stuff that says there is virtually no difference except the springs. I was wondering if they both have the same front axles, but other than that what are other differences?

Second, do the trucks still have the ball joint issues I have read about? Do you gas burners seem to have less trouble with the joints due to the reduced weight? I have read there is really no fix for the joints. Is this true?