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Old 10-12-2015, 10:07 PM   #21
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Wasn't the OP question about overdrive? I thought tow/haul and overdrive were different things.

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Old 10-12-2015, 10:27 PM   #22
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Talking to a very knowledgeable Dodge tech, he advised if you are towing over 5k lbs then tow haul should be on and lock the tranny in 5th. This is for newer trucks and depends on the RPM's and your rear gears. On my old truck with 4:10 gears and 4 speed it would just drone along and rarely shift. Fast forward to 2010 truck and any mole hill would cause the truck to down shift. But now I have 3.73 gears and a 6 speed tranny. So now I tow in 5th and it drones along again. But the RPM's have to be up around 1800 to keep it from gear hunting. He also advised me that if driving in a city I should manually shift the truck to a gear low enough to keep my RPM's up and keep it from lugging...

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Old 10-13-2015, 02:20 AM   #23
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This is a vehicle specific question. My 05 F350 is nothing like a Jeep Liberty.
But to answer your question, no I do not take it out of overdrive but I do put it in Tow mode. Higher shifts to keep the rpms in the torque band, and engine braking are two benefits for me.
Consult your owner's manual, follow the recommendations, from your observations do what works for you.
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Old 10-13-2015, 04:10 AM   #24
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Many have said it already. Read manual, based upon an opened ended statement that is all that can be said. If you are towing through the Laurenitian's with a Jeep Liberty you might very well not have enough TV for the back roads. I would be careful with trying to over do it, the Liberty is a passenger car.
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Old 10-13-2015, 05:50 AM   #25
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I'm towing a Rockwood Roo 21DK (approx. 5000 GVW) with a Chevy Avalanche 5.3 2WD. I am typically in "tow mode" with overdrive off unless I'm on a very flat portion of highway/road. Even overpasses tax my Chevy (then again, I'm very new to this and perhaps bit hyper-sensitive). I'm still getting used to all the pops/clicks from the WDH. As other posters have stated, I'd err on the side of caution and not over do it.


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Old 10-13-2015, 06:32 AM   #26
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I always push the "tow/haul" function whenever I tow my trailer! And why not as it put's less stress on the drive train. If I can't afford a bit more gas, maybe I shouldn't own an RV!
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Old 10-13-2015, 07:05 AM   #27
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Originally Posted by fmc View Post
I do not use the tow mode most of the time. I do use it if we are in the mountains or another very hilly or steep grade area. I also use cruise control to maintain a constant 62 MPH which seems to give us the best fuel economy.
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Old 10-13-2015, 07:46 AM   #28
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I just put it in tow mode and let the computers do their thing.
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Set curse at 65 mph. Pulls great on flat lands of Texas. Still have plenty of power
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Old 10-13-2015, 07:51 AM   #29
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My book tells me the max torque is at 1800 rpm and towing at 65 mph or slightly under runs the engine right around 1800 rpm while in 6th gear with tow/haul used whenever towing.
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Old 10-13-2015, 08:17 AM   #30
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Originally Posted by Filthy Beast View Post
My book tells me the max torque is at 1800 rpm and towing at 65 mph or slightly under runs the engine right around 1800 rpm while in 6th gear with tow/haul used whenever towing.

Every truck when pulling has it's 'sweet spot', this may be yours. I used to drive hundreds of miles at 70mph and my RPMs would be around 2100. (Diesel)

(I don't drive 70mph much any more, 65mph is just fine all the way around at the slower speed. 1900RPMs)

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