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Opinion on towing

 
Old 05-25-2019, 12:37 PM
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I will be towing a U-Haul trailer from WV to SC and will encounter some long relatively steep long grades along my route. I believe there are a few 5-8% grades for a few miles. My question is , for ease on the truck and temps and all that, would I be better off running 4th gear 2500-3000 rpm and less boost. Or, should I just leave it in 5th gear 2000-2500 rpm with higher boost. I have a 2012 3.5 with 6speed . Thanks for the insight.
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Old 05-25-2019, 12:43 PM
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higher rpm always. Low rpm and high boost puts tremendous strain on the motor and generates tremendous heat. Keep it in tow/haul and it should be the brains for ya.
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Old 05-25-2019, 12:51 PM
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Thank you I'll follow that advice.
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Old 05-25-2019, 02:31 PM
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How heavy? If in doubt use lower gears, but it all really depends on a LOT of factors. Just because it is an automatic doesn't mean you can't change gears as conditions change. I doubt if you'll need to lock out 5th and 6th except in pretty steep conditions and if loaded pretty heavy. I don't know if you're going to be pulling 3000 lbs or 10,000 lbs. But you'll just have to try to determine how the truck is handling the weight and select the proper gears for the conditions. There will be sections where you may well be able to use 6th gear.
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Old 05-25-2019, 07:33 PM
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I let the truck decide. Whatever it can hold with cruise control, then lock it to avoid shifting around.
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Old 05-26-2019, 10:55 AM
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Originally Posted by kruman View Post
I will be towing a U-Haul trailer from WV to SC and will encounter some long relatively steep long grades along my route. I believe there are a few 5-8% grades for a few miles. My question is , for ease on the truck and temps and all that, would I be better off running 4th gear 2500-3000 rpm and less boost. Or, should I just leave it in 5th gear 2000-2500 rpm with higher boost. I have a 2012 3.5 with 6speed ..
Assuming you don't exceed either the GVWR or the GCWR of the tow vehicle, then put the tranny in tow/haul mode, set the cruise control at 62 MPH, and drive. Turn on the digital tranny temp gauge and watch it. As long as it doesn't exceed 225, then no worries. It the tranny temp gets up to 225, then downshift one gear from where it was cruising. When on the flats, shift back to drive in tow/haul mode and let the truck decide which is the correct gear.
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Old 05-26-2019, 12:18 PM
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What is the rear end gearing? Knowing this can help to pick the right gear.
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