Tow/Haul Button - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 11-15-2009, 06:48 PM Thread Starter
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Tow/Haul Button

Can someone explain to me exactly what the Tow/Haul button does, besides just shifting down when you are slowing down or gaining speed down a hill?

Thank you very much.



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post #2 of 4 Old 11-15-2009, 07:00 PM
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As per Ford Workshop Manual Description And Operation:
Quote:
Originally Posted by Ford Workshop Manual
With the tow haul activated, the transmission will have the following features:

-Shifts will occur at higher vehicle speeds for a given accelerator pedal position to improve vehicle acceleration, reduce excessive shifting and increase the coast braking capability.
-The torque converter will lock up at lower vehicle speeds than normal with a given accelerator pedal position to improve transmission cooling and efficiency.
-Upshifts are temporarily delayed while decreasing accelerator position during hill cresting to reduce excessive transmission shifting and to prepare for a possible grade braking downshift event.
-Engine braking is provided in all forward gears without the requirement of moving the shift lever.
-Manual 1, 2 or 3 will still be available.
-Grade braking downshift feature provides increased coast braking automatically to assist driver in maintaining desired speed while descending a grade. This reduces duty cycle on the brake system and increases brake pad longevity.
-Grade braking downshifts are automatically commanded when:
*positive vehicle acceleration is sensed (natural acceleration from grade descent).
*a near zero accelerator pedal position is obtained.
*a minimum amount of time has expired since the last grade braking downshift.
-Grade braking downshift mode is immediately exited should the tow haul mode be deactivated or if the accelerator pedal is depressed beyond a minimum threshold.

http://www.yorkdaleford.com/service.html

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post #3 of 4 Old 11-15-2009, 07:04 PM Thread Starter
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Thank you very much, that is waht I was looking for!!



'03 F-350 6.0 CC LB 4X4:
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post #4 of 4 Old 03-30-2010, 07:38 AM
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Has anyone had any problems with the trans slipping when button is pressed for tow, had a dealer say that the Direct Clutch assembly needs to be replaced or rebuilt and thoughts?
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