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Old 03-12-2007, 03:44 PM
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Tow Q

new to towing and was just wondering about the tow haul and the gain output controls? Do I need to use the tow haul if I'm only towing about 2500 lbs? I've tried it and it seems that the truck runs harder than if I don't use it. Gain output? I see I have a few choices....... what should I be at + or - for this weight? I think it is at 9 as a default. Should I be more or less?

Scott
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Old 03-12-2007, 04:02 PM
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I think that would be at the discretion of the driver on the need to use the tow/haul, and there should be some instructions with the unite for setting it up. I usually have it set around 2 1/2 to 4, but you have to play with it to get it where you want it. You should have 1 control for the speed that it applies, and another to control the strength of the application.. Hope that helps.

Gord.
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Old 03-12-2007, 04:14 PM
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Ok....

but what is the purpose of the tow/haul does it change the gearing? It also seems to use the tranny to help slow the truck but does this shorten the life of the trans if used regularly? I get that it is saving the brakes. Still don't get the gain output thing? I'll break out the owners manual and see if there is instruction on how to use this feature.

Thanks Gord

Scott
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Old 03-12-2007, 04:51 PM
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The tow/haul mode changes te tranny's shift points and also kicks in massive engine braking. It will run higher rpms before shifting. The engine braking is awesome when slowing down a trailer.

The gain/output should be adjusted like this: Set the gain low, like 2 or 3. Hook up the trailer and drag it around until you get the brakes warm. Then, when you are going about 30 or so slide the brake lever as far as it will go and see what the trailer does. If the trailer wheels don't slide then up the gain a bit and repeat. Keep doing it until you get trailer brake lockup and then back down on the gain slightly unitl the trailer brakes don't lock anymore. That's set for maximum trailer braking.

As far as towing 2500 pounds, you probably don't have to use tow/haul, but the engine braking is so cool that I use it when I am towing anything.
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Old 03-12-2007, 05:01 PM
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I see...

Thanks Manatee. I'll try it tomorrow.


Scott
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Old 03-19-2007, 08:18 PM
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I pull about 8000 pounds, I use tow/haul in town and until I get to cruising speed on highway, and take it off. Then when Im getting ready to get off the freeway I put it back on to help brake. This works great for me, I havent found the need for it on the highway, my truck has enough power to pull the trailer up grades without downshifting.
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Old 03-19-2007, 09:14 PM
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i use it towing lighter weights cause im running 3.73 gears with 40'' tires so it seems to help
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Old 03-20-2007, 03:11 PM
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Not sure about the gain output, but for only 2500 lbs you do not need the tow haul mode. I'm sure the truck barely recognizes that it's back there!
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