Join Date: Nov 2010
Location: Central CT
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Sport mode and Tow Haul are two mutually exclusive things. Sport mode uses completely different, and MUCH simpler shift logic, even from regular Drive. There is no grade logic for going up and down hills. It shifts based on significantly fewer parameters, mostly just throttle angle, speed, and current gear position. Putting the trans in S makes pressing the Tow Haul button completely useless, it literally does not work in S mode, even though for some reason the light will come on anyway. Drive and TH are the recommended settings for towing anything heavy. TH changes torque converter logic, shift maps, trans line pressure, and throttle tip in, all to make towing easier on the truck and on the driver. S mode does not do any of these things, regardless of whether or not you press the TH button, it completely overrides it. Let the transmission shift (in Tow Haul), it has six gears for a reason.
New EnglandTundra Club Member #10
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2019 Ram 1500 Laramie Crew Cab
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