One of my friends has an '04 1500 truck that we've been playing with and he would like to firm up the shifts, I don't know much about the transmission end of tuning since I drive a MN6 so can someone help me with what I need to do ?

Thanks !

 

Anyone ?

 

You can modify shift times and line pressure to firm them up some, I would set the shift times to how quick you want them to shift then up line pressure till its as snappy as you like. I would then very slowly start to lower force motor table until you get the firmness you want. i wouldnt take the shift times below .125 though, thats about as low as the computer likes it.