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Old 10-21-2013, 09:27 AM   #99
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My 2012 Dodge Ram 2500HD with Cummins HO with automatic transmission will also start the entire rig moving at idle. The brake must be applied while stopped at a stop light.
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Old 10-22-2013, 05:48 AM   #100
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My 2012 Dodge Ram 2500HD with Cummins HO with automatic transmission will also start the entire rig moving at idle. The brake must be applied while stopped at a stop light.
My Honda Odyssey does the same, if you don't apply the brakes the rig starts moving. V6 gas engine.

It doesn't take much power at all just to get rolling on a level surface. I've posted this before, if you install an OBD I I reader, you might be surprised by how little power is actually needed when towing. The highest output I've ever measured was 148hp accelerating from a standing start on an incline.
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Old 10-24-2013, 08:57 AM   #101
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My Honda Odyssey does the same, if you don't apply the brakes the rig starts moving. V6 gas engine.

It doesn't take much power at all just to get rolling on a level surface. I've posted this before, if you install an OBD I I reader, you might be surprised by how little power is actually needed when towing. The highest output I've ever measured was 148hp accelerating from a standing start on an incline.
Just as a point though, part of this has to do with the stall speed the manufacturer has chosen and designed into the torque convertor. Our Ford powerstroke with 5R110 trans pretty much does not move just letting off the brake. You have to bring the revs up, and I believe Ford has chosen this in order to get the turbo to spool up for greater torque in order to get the mass moving.
If the convertor reaches stall at too low RPM then you could have insufficient torque to move a maximum load from a standing start, especially uphill.
I was able one time, to be in a situation with this truck where in 4high, I put the pedal all the way to the floor and the truck and trailer did not move, and no tire spun
Got out of it, selected 4low, and stood on it, and we moved. We were, maybe just a tad overloaded that day.. .... plus the big problem was the back of the hay trailer had grounded out pretty hard crossing a shallow ditch.
I suspect that little exercise was dumping a fair bit of heat into the tranny....
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Old 10-24-2013, 11:55 AM   #102
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The newer trucks have traction control that will not allow wheel spin and on rare occasion must be shut off .On gravel,grass,dirt,or wet pavement in some cases shut it off till you get moving
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Old 10-24-2013, 03:44 PM   #103
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The newer trucks have traction control that will not allow wheel spin and on rare occasion must be shut off .On gravel,grass,dirt,or wet pavement in some cases shut it off till you get moving
True enough, some do have traction control. But believe me, this F350 Dually will spin them ! LOL....one day, I hear the truck out there revving up and down. I hear the turbo spooling up and down. I step out of the barn, and the blond bombshell of Storybook Stables is doing her best to dig her way to China with that thing ! Horse trailer was stuck in the mud, and Miss K was darn well gonna get it out of there ! I was like....whoa, whoa !!! Hooked onto it with a tow strap and the tractor and pulled it all out of there before she had a chance to have the whole truck sitting down on the frame. It was rather impressive though seeing all the mud she was throwing.....
she was definitely way above the torque convertor stall speed that day !

Having said all that, it "could be" there is a power or throttle limit that is imposed. There is on my Nissan Frontier ( manual trans ). In 4Low, in first gear, even if you put your foot to the floor, the computer limits how far the throttle is opened to 50% if I remember the number correctly. Danged computers trying to save us from our own stupidity ..
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