I just purchased (800 miles so far) a 2500 2002 automatic and love it, but would like to add more power before i start hauling my 10k hay trailer this summer. I was dissapointed when many people told me that i could not upgrade as easily with an automatic transmission. i am not looking for a major increase just enough to help me up the steep colorado passes. i would also like somethin that would would not void my warranty or is easily taken off when taken to the dealer. thanks for the help