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Old 07-22-2016, 02:49 PM   #11
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Wait a minute. You turn on exhaust brake and leave it on when towing?? You don't just turn it on when you want to help you slowdown as in going down steep hills.
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Old 07-22-2016, 02:55 PM   #12
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Also use the exhust brake some while not loaded so it doesn't freeze up over long periods of non use
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Old 07-22-2016, 02:58 PM   #13
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First thing I do after starting the motor is reach over and turn exhaust brake on. Keeps the vains in the turbo clean.
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Old 07-22-2016, 04:08 PM   #14
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Handydc - You don't want to be reaching for a button on the dash when you need to hit the brakes, especially if it is a panic stop.
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Old 07-22-2016, 04:24 PM   #15
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Quote:
Originally Posted by Handydc View Post
Wait a minute. You turn on exhaust brake and leave it on when towing?? You don't just turn it on when you want to help you slowdown as in going down steep hills.
Yep. Whenever I'm towing I turn on the tow/haul and the exhaust brake then let the truck do all the work while I supervise!
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Old 07-22-2016, 04:59 PM   #16
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Yep. Whenever I'm towing I turn on the tow/haul and the exhaust brake then let the truck do all the work while I supervise!
Well you learn something new everyday.
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Old 07-22-2016, 05:03 PM   #17
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Some of you may want to have a quick look at this simple link

GMC Sierra HD Exhaust Brake Video | GM Authority


I read someone mentioned you should use it from time to time so it doesn't freeze up. Nothing is going to freeze up. Its the turbo vanes, they are in constant motion, opening and closing. Variable geometry or variable vane turbos allow the vanes to open and close. When the "Exhaust Brake" is active the vanes close and create what I will call "compression braking" essentially using additional back pressure to slow the motor rpm down.

You can leave the exhaust brake on all the time if you wish. I have not encountered any data that would suggest it is harmful in any way to do such. One thing to keep in mind is during slippery conditions the exhaust brake can cause the truck to break lose and slide. I leave mine engaged a lot even when driving around down. It helps keep the motor loaded when not towing, generates a little extra heat, but again, not harmful. In winter this is nice on the Cummins.

The newer Rams also have an "auto" mode which I am not sure is the same as the GM's, but it will only activate when the brake pedal is pressed vs any time the accelerator is released.

When towing moderate to heavy loads your tow/haul helps the transmission by holding shift points longer to also reduce gear hunting.

My Ram when hauling in the rocky mountains, exhaust brake "on" with tow/haul and cruise will maintain my set speed up and down mountain passes without touching the brakes. Heavier loads will require some braking pressure and assistance from the TT.
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Old 07-22-2016, 05:29 PM   #18
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Two completely different systems. I pull with gas so no option for an engine brake. The tow haul mode will keep you from running away on a hill by down shifting your transmission. We live on BC so pull long steep hills pretty much every place we go. In steep country I prefer to turn off tow haul and control the transmission manually because sometimes you can travel faster downhill than the mode will allow you without over revving. I would guess an engine brake in combination with tow haul is the best of all world's.
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Old 07-22-2016, 05:39 PM   #19
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like guyster my exhaust brake is on all the time... a respected Ram diesel mechanic said do it that way ...Tow/Haul when towing the toy hauler and it does affect the exhaust brake. I dont use it for my small cargo trailer.
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Old 07-22-2016, 07:51 PM   #20
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I had a 08 2500 diesel and no exhaust brake but you could set the cruise and put truck in tow/haul and truck would act like it had a exhaust brake. As a matter of fact you can do the same with a 2500 gas burner and I think with a 1500, Silverado of course


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