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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
I know the flashpaq for my 05 can manipulate the rev limiter, along with the speed limiter. As for an 03, I don't know. I believe that Superchips and Hypertec both advertised that the non flashpaq programmers (for previous year trucks) did allow for changing of the rev and speed limiters.
As I understand it, the rev limiter can be changed but the shift points can't be altered since it's a separate unit. The only way to take advantage of the raised limiter would be to manually shift it yourself.