Tow/Haul mode significantly changes the transmission shift pattern to reduce
shift cycling and to deliver better performance, control, and cooling when towing
or hauling heavy loads. For instance:
| • | Upshift points are raised at light to mid throttle position to use more
of the available engine power for acceleration. Downshift points are raised to enhance
engine braking to help slow the vehicle. |
| • | During deceleration, the torque converter clutch (TCC) remains
applied at closed throttle at lower speeds to significantly improve the effect of
engine braking. |
| • | During acceleration, the TCC is applied in 2nd range and remains applied
in 3rd, 4th, and 5th. This improves the drivetrain efficiency and significantly lowers
transmission sump temperature when towing heavy loads. In Normal mode, the TCC generally
applies only in higher ranges and is dependent on throttle position. |
| • | Tow/haul is designed to be most effective when the vehicle and trailer
combined weight is at least 75 percent of the gross combined weight rating (GCWR)
of the vehicle. |
| • | Operation of tow/haul in a lightly loaded or non-loaded vehicle
will not cause damage. However, there is no benefit to the selection of tow/haul when
the vehicle is unloaded. This situation will cause a firm shift. The tow/haul switch
is not a performance switch. |
| • | Selection of tow/haul when unloaded may result in unpleasant engine and
transmission driving characteristics and reduced fuel economy. Tow/haul is recommended
only when pulling a heavy trailer or a large or heavy load. |
Activation
| • | Tow/Haul is selected or de-selected via a switch on the end of
the transmission shift lever. A light on the instrument panel will illuminate to indicate
that tow/haul has been selected. |
| • | Tow/Haul must be selected again, every time the vehicle is started, if
desired. |
