bad transmission or super chip issues?
 

i have a 04 dodge 2500. i never really noticed any trans issues till i got the super chip its a 3805. depending on how much i press in the pedal the more it jumps from 1st to 2nd and i tried looking up codes on the truck but it doesnt show anything. will taking off i have press the pedal all the way in and the truck revs to about 3500rpm and just stays there till i let go on the pedal and then it will shift over to the next gear.but what i have noticed also its that this only happens when im going from 0-40mph once it gets to about 40mph everything shifts fine. bad trans???? tried talking to super chip people and they say it has nothing to do with there programer. thanks in advanced