I was towing a trailer today approximately 8500-10000lbs. Truck would not excelerate right have an sct tuner with a custom tune what I mean by not excelerating is you will floor it and rpm go up to 3000rpm and truck goes no were just stays at 60 and slowly slowly climbs.

 

is it a towing tune??

 

Yes its a tow tune. I believe they came from eric

 

Does anyone have any ideas on what it could be the truck runs fine. When I hook up and put a load on it and put it stock or tow tune the truck will not accelerate right its almost like it wont wind out all the way revs up to 3000 rpms and stays there takes forever to shift.