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Old 04-22-2016, 11:47 AM   #1
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F350 Diesel Question

When do you enable Exhaust Braking?

I am towing a Rockwood Roo loaded weight 5500, but not sure if it should be on all the time when to/haul is on or if it is just for heavy loads or steep hills?

Also after towing should the truck run for a few minutes to cool down, last time I drove a Diesel it was the 1990's so just wondering if I can just turn the key and go? And is it ok to just shutdown the truck for small trips?


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Old 04-22-2016, 11:52 AM   #2
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Curious about the "cool" down myself actually..
I leave my tow haul and EB on all the time when I tow.

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Old 04-22-2016, 12:00 PM   #3
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I leave the tow/haul on whenever I have the 5th wheel attached. It makes a great different when stopping or going down hills. Also the tow/haul mode via the computer changes the shift points and such for the vehicle. The mfr instructions say when ever you tow you should have the tow/haul mode on.

I try and let the engine warm up a little bit before taking off in the morning. When we stop for lunch or something on the road I just turn the truck off.
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Old 04-22-2016, 12:02 PM   #4
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I don't use the tow/haul on my 3500 when towing my fishing boat, or ATV utility trailer.......well not very often.

I assume I will use it all the time with the 5'er.

On Chevy, the 'jake brake' isn't really an engine brake. It's a transmission shifting device, much like tow haul. Not sure having both on simultaneously would help......will have to experiment. Ford and Ram are different though.
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Old 04-22-2016, 12:21 PM   #5
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I use the Tow/Haul and Exhaust Brake all the time when towing.

In the winter on Ice and Snow I have used the Tow/ Haul and exhaust brake to keep the vehicle under control. 4 wheels with dynamic braking works really well.

After a long run I do let the engine idle for 30 seconds after parking just to let fluids circulate and the Turbo if it was used as exhaust brake to cool down.

The Exhaust Brake is really that on a Ford. Uses the Turbo to slow the truck.

The Exhaust Brake is really that on a GM. Uses the Turbo to slow the truck. Works with the transmission to change shift points.

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Old 04-22-2016, 12:25 PM   #6
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As soon as you engage the tow/haul on the shifter the diesel brake is activated. You can disengage it with the switch on the dash, but I just let it do its thing. As far as cool down goes I wouldn't worry about it.
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Old 04-22-2016, 12:30 PM   #7
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Exhaust brake can be used ANY TIME. Personally, mine is on 100% of the time. Exhaust brakes on these trucks have numerous advantages, most notably that they will help your engine warm up more quickly due to the backpressure they create at idle. The Ram also has a high-idle feature. On a super cold day, I can get the truck to full operating temp within 5 minutes with exhaust brake and high idle, but if I just start it and let it sit, it could idle for 30 minutes and would never get that high.

As for cooling, do you have an oil temperature gauge? Oil is used to cool the turbo, so that's an indication of whether or not the turbo is ready to be shut down. Last thing you want is a super hot turbo cooking the oil it has sitting in it. In my case, normal operating oil temp is about 200-210 degrees. When towing heavy, I often see the oil temp climb to 230. If I come to a stop, I let the engine idle until I see it drop closer to normal temp, then shut down. It's unlikely you will ever have to worry about turbo temperature when driving unloaded, except maybe on super hot days, and it would be dependent on the weight of your right foot.
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Old 04-22-2016, 01:43 PM   #8
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Quote:
Originally Posted by mcnabbwr View Post
As soon as you engage the tow/haul on the shifter the diesel brake is activated. You can disengage it with the switch on the dash, but I just let it do its thing. As far as cool down goes I wouldn't worry about it.
Are you sure about that it activated with the tow haul mode. Mine has light on the dash that shows if the exhaust brake is on or off and if I turn on Tow Haul Mode the light doesn't lite. I have to push the button on the dash for the exhaust brake light to come on.
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Old 04-22-2016, 01:45 PM   #9
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All great Info guys, I always use Tow/Haul when hauling heavy loads or Towing no matter what. I will monitor the oil temp and tranny temp every trip, and I will always warm up the truck for a minute or so to let fluids circulate.

I also have the supplemental heater that works in the cold until the diesel warms up, keeps the cab warm and toasty. I will watch the temps more over long trips and the heat in the summer although the Roo Hybrid hardly works the F350 I plan on taking care of it to get many good and safe years out of it, just bought it so it is a 2016.

Love this forum all great info more so from ppl with actual experience then anywhere else. 😄


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Old 04-22-2016, 02:34 PM   #10
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I haul my 36 ft Silverback in tow mode 100%. Use Ram exhaust brake about 50/50 when towing. We are in Atlanta and no hills. The 50 percent comes into play in the N Georgia mountains. I can travel down a 6% grade, LOADED TRUCK AND RV, and NEVER touch the brakes.
Same set up, prior 5er, x the USA mountains of Arizona, New Mexico, up to Grand Canyon, back through gates of HELL in spring storms of Texas, NEVER ANY ISSUE. Truck is Ram 2500; 6.7 turbo diesel. 11 mpg; holds speed control everywhere except mountains. Have it regularly serviced and book maintained at Dodge. I would ONLY COOL DOWN if
stopping after aggressive hills. ( engine winding ).
I drive this truck around town on a regular basis as a 2nd vehicle. Vehicles need to be driven. Hoses, seals, etc work like they should when this happens. Oil breakdown over TIME or MILES! Stagnant fuel is not great either.
I DO NOT spend any time warming it up or cooling it down.
Hey, it works for me. At least the first 67,000 miles 👍
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