Question about 2004 Dodge Durango

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When towing with my 2004 durango in tow haul mode

When towing with my 2004 slt 5.7 hemi durango in tow haul mode, On steep hills the temp gage goes up between 1/2 & 3/4 and the engine loses power. Is this the tranny cooler kicking in as there is a humming noise? The revs go up but nothing happens, there's no power, you can try to accelerate but the truck just slowly loses speed.
Thanks Caz

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Tranmission is sliping or low on fluid.is there a lot of miles on truck.engine not lossing power transmission is sliping.

Posted on Jul 31, 2010

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1 Answer

What would cause my TAHOE TOW/HAUL mode to engage on its own?


You need to have a diagnostic scan tool hooked up ,glitch in one of the control modules or a wire in the circuit shorting to ground ! probably something simple but hard to find ! With a factory scan tool they can check the input signal to the BCM ,PCM .
Tow/Haul mode enables the operator to achieve enhanced shift performance when towing or hauling a load. When tow/haul mode is selected, the tow/haul switch input signal to the body control module (BCM) is momentarily toggled to zero volts. This signals the powertrain control module (PCM) or transmission control module (TCM) to extend the length of time between upshifts and increase transmission line pressure. Cycling the tow/haul switch again, or cycling the ignition switch disables tow/haul mode and returns the transmission to a normal shift pattern.

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When towing my horse trailer on inclines engine has a problem and starts slowing down.


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I have a 2004 tahoe and this light came on i don't


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While driving along mostly up hills and or pulling my 2002 dodge ram 1500 5 speed tends to loose power. What could be the cause of that?


All vehicles will lose a certain amount of power when going up hill or towing depending on how steep the hill or how heavy the load. Do you shift down when needed.

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Tow haul mode has no change on transmission operation. Truck barely moves a 6000lb trailer when starting off on a hill. 3/4 ton with a 6.0 and 3.73 rear end.


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You should as it also manges the control system for the trucks ABS pump as well as the transmission line pressures.

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95 Landcruiser Turbo warning light comes on under heavy load


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