We are looking over the RAM 1500 Tow/Haul Button function and what it actually does to the truck when towing a heavy trailer. The transmission and engine are both slightly affected and in order to increase your engine power and torque when towing a trailer.

first, tow haul mode affects the transmission shift timing, the truck will hold gears longer in order to pump the rpms up and hold that torque longer before shifting. secondly on the transmission, the overdrive gears will not be used (for the most part). my truck with the 8 speed transmission will sit in 6th gear which is a 1:1 gear ratio allowing for once again increased torqued.

On the engine, the MDS system will not be active meaning that the truck will be in 8 cylinder mode at all times to obviously supply you will good continuous power and torque when towing. that being said, this will also increase you engine braking when going downhill. reason being because when the MDS system is active and when the truck is going downhill, the truck will sense less power is needed and shift into 4 cylinder mode to save fuel. But when in tow haul mode you can utilize all 8 cylinders to help slow the truck down.

Lastly and most obviously, your fuel economy will tank. will all 8 cylinder active at all times you will use more fuel and because your gears will be held longer resulting in higher rpms is also going to greatly increase your fuel consumption.

Hope you guys like the video!