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Old 05-27-2014, 05:30 PM   #1
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Pulling Camper

how should I pull my camper that is a 29ft 2013 springdale that weights 9570 dry weight Iam pulling with a 2500 HD 6.0 gas should I use tow haul mode on or off while pulling dealership told me to use that mode to climb bridges and to start off from a stop truck is also new so I sure don't want to hurt the transmission so any advice would be welcome Thanks in advance chad
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Old 05-27-2014, 05:57 PM   #2
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I have used the used the haul mode on my Suburban for 5 years from beginning of trip to end and have not had any problems. The way I see it is the overdrive is the only thing missing. Gas mileage does not vary either way. I lose 4 mpg when towing. Each to his own but I have no problems
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Old 05-27-2014, 06:04 PM   #3
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I understand the "Haul Mode" is merely stepping down in gears from Overdrive into the next lower gear, that's all. The reason I was given for using Haul Mode is to avoid the automatic tranny constantly changing into and out of Overdrive, whatever "constantly" might mean to you. I have gone whole trips using the Haul Mode, i.e. staying out of Overdrive, across Canada and the US several trips.
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Old 05-27-2014, 06:09 PM   #4
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I would stayin haul mode. You don't need to be in overdrive while towing.....
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Old 05-27-2014, 06:54 PM   #5
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I have a ram 2500 6.4 hemi with a 10k lb TT and tow/haul mode keeps the gears from shifting till a higher rpm so you can accelerate more in low gears and also not switch to overdrive back and forth when you're hauling an load at highway speeds. I can hear and feel a noticeable difference.
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Old 05-27-2014, 07:06 PM   #6
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General rule: IF transmission is "Hunting" for the proper gear,, Tow/Haul mode may stop that. If tranny is happy with the gear it's in for like 100 miles at a time.. You are good in the regular mode.

Exception if you are in hilly country, Tow Haul all the time there.
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Old 05-27-2014, 08:01 PM   #7
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I have found with my truck that the tow haul mode still allows me to go into overdrive, but it takes a while longer, but I have a 1 ton truck pulling a 4500 pound trailer (can anyone say overkill). I technically don't need it, but I do like how it can "somewhat" control your decent down hills. I would use common sense and not just your tranny to control your decent.
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Old 05-27-2014, 08:12 PM   #8
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I use the tow\haul mode on my F150 all the time while towing. In addition to keeping me out of OD most of the time, it also seems to keep me IN a higher gear a little longer before downshifting to climb hills or pass. I don't seem to get much better milage with it off so I figured I would rather pay a smidge more in gas and a lot less in repair bills.
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Old 05-27-2014, 08:19 PM   #9
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Definatly use it. It goes to a higher rpm before shifting and downshifts quicker as you slow down too help in braking. You will still have your over drive but it keeps the tranny from constant shifting which will burn up your tranny. I also had the 6.0 and will notice a big difference in the engine rev before shifting but it helps with power and saving your tranny.
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Old 05-27-2014, 09:51 PM   #10
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There's lots of info, and I think a lot of people are confusing Tow/Haul with Overdrive on/off.
What year truck is this? I don't think all years had the same T/H strategy on the TCM.
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Old 05-28-2014, 11:19 AM   #11
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No disrespect .....

When all else fails,and maybe your new tranny....read the manual.

I would believe the manual, even over the dealer, after all it was written by the people that built your truck. No one knows better.
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Old 05-29-2014, 06:21 PM   #12
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I have read the manual it does not have much in it but I have a lot of info on this forum to go by Thanks again.My truck is a 2013 GMC 2500 HD with a 6.0 gas engine with 373 gears in the rear axle it pulls good my trailer uvw is 7270 lbs. I'm estimating about 800lbs pounds of gear give or take thats the only reason I asked the question I did because of the weight. Thats why it pays to ask question again Thanks guys!!!!!!
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Old 05-30-2014, 10:05 AM   #13
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The Tow Haul mode usually just modifies the shift patterns to keep the vehicle in a single gear longer, and possibly increases the pressure for firmer shifts. Good advice to read the manual. It also downshifts the transmission when decelerating and keeps the torque converter engaged--when not in TH mode, the TC usually disengages for better coasting/fuel mileage. My experience is with superduty fords, so may be different for GM/Dodge.
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