
Originally Posted by
Silver64
OK, I have an 2008 f350 4x4 I purchased with dead engine. Truck only has 79k. Right now it as a 12valve P Pump engine. Trying to get the transmission shifting properly. Right now with stock tune it shift nice and smooth runs great BUT only under light throttle normal day to day driving. If I have to take off with more than light throttle, anything over 1/4 throttle it flares/slips between 2-3 shift and 3-5 shift. If i let off the pedal itll go into gear.
Does anyone have a known working tune for cummins in front of 5r110 that I could compare and try? As I purchased the truck in unknown condition I have no idea if its shifting like this do to the cummins swap or if there are issues with the transmission, though it is not showing ant dtc codes when scanned.