Drivetrain swap in an old truck. Using 05 grand Cherokee 5.7L and 545rfe transmission. using 2007 Durango pcm i have no speed reading on gauge or hp tuners RPM reads great on gauge and hp tuners just no speedometer. Probably a dumb question but Im curious if the speedometer is as important as RPM before i ask if someone could look at the data logs and recommend any changes to make. Thank you.