Thor Forums

[Chance]

Originally Posted by Tfryman

No, he's saying buy their DuraTrans and BrakeMax systems

It sounds to me like he's saying that's an option to having to do it manually each time you start out, but doesn't contradict the previously-made lower fuel economy statement.

I believe some of the points made regarding torque converter lockup also don't apply to newer 6R140 6-speed transmission.

Keep in mind that the intention of having overdrive gears is to improve fuel mileage. To get that improved fuel mileage you need to get into that overdrive gear as soon as possible, and stay there as long as possible. As a general rule, automatic transmission electronic strategy is to get you into the highest gear possible, and lock up the torque converter as soon as possible for a given engine load. EPA test methods for fuel mileage testing and ranking of OEM vehicles does not currently allow for the pushing of a button during the test to “allow” overdrive. The test must be done by dropping the shifter into drive and off they go. If the vehicle started with OD off / OD cancel / Tow/Haul engaged, EPA fuel mileage ratings would suffer.

You can take advantage of the benefits of the transmission control strategies associated with the transmission control switch by remembering to hit the button or switch every time you start your vehicle...or...you can contact InterMotive about our DuraTrans and BrakeMax systems that perform that function, and more, for you.