Join Date: May 2014
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transmission shifts up and down in 3rd to 4th
Just put the dp tuner on my truck ran the 80hp daily tune and then ran the 140hp tune. Didn't push the truck to hard. But right after that I got on the high way and it started shifting weird. It would get into third then shift in to 4th then back down. Does it 2 or 3 times, the it goes into 4th. Scanned the truck no transmission codes. But a few so called common codes that you would get with a tuner.
Mods aem big boost intake fpx hpx 4inch turbo back exhaust.