Help: truck shudders in tow/haul mode
I was using my idp tow tune and was towing a 8k trailer. I was in tow/haul mode and would experience a bad shudder between 4th and 5th gear. I would have to let off the accelerator for it to stop. If I took it off tow/haul mode it would not do and shuddering. I have towed before with my tuner and in tow/haul mode and never had this happen before so it was very surprising. Is it possible that the tune dident load right when I switch from street to tow on my tuner? Or if its axel wrap why have I never experienced it before towing the same trailer? Anyother possibilities anyone can think of?