Dodge 2009 Ram 3500 - Manual (Page 261)

This will improve performance and reduce the potential
for transmission overheating or failure due to excessive
shifting. When operating in “TOW HAUL” mode, 5th
gear (if equipped) is disabled and 2-3 and 3-4 shift
patterns are modified. Shifts into Overdrive (4th gear) are
allowed during steady cruise (for improved fuel
economy) and automatic closed-throttle downshifts to
3rd gear are performed (for improved braking) when
driving conditions warrant. Pressing the “TOW HAUL
O/D OFF” button a second time to select O/D OFF will
disable 4th and 5th gear completely, which should elimi-
nate any excessive transmission shifting.
The “TOW HAUL” or “O/D OFF” light will illuminate in
the instrument cluster to indicate when the switch has
been activated. Pressing the switch a third time restores
normal operation. If the “TOW HAUL” or “O/D OFF”
modes are desired, the button must be pressed each time
the engine is started.
Torque Converter Clutch
A feature, designed to improve fuel economy, has been
included in the automatic transmission on your vehicle.
A clutch within the torque converter engages automati-
cally at calibrated speeds. This may result in a slightly
different feeling or response during normal operation in
Tow Haul O/D Off Switch
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