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Old 09-17-2012, 05:39 PM   #1
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Towing with cruise control on?

So throughout my reading of the forums, I keep coming across comments that say not to use cruise control when towing. I understand why I would want to control the throttle when climbing a steep hill or in traffic, but why would using cruise under normal conditions be a problem? I have been using cruise when towing and my truck doesn't seem to mind. I use tow haul mode and depending on conditions I will lock out 6 th gear.

Any comments would be appreciated.

Mark
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Old 09-17-2012, 05:45 PM   #2
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Quote:
Originally Posted by Mark S View Post
So throughout my reading of the forums, I keep coming across comments that say not to use cruise control when towing. I understand why I would want to control the throttle when climbing a steep hill or in traffic, but why would using cruise under normal conditions be a problem? I have been using cruise when towing and my truck doesn't seem to mind. I use tow haul mode and depending on conditions I will lock out 6 th gear.

Any comments would be appreciated.

Mark
I used CC when towing our Silverback FW from TX to CA and back thru NV and CO with no noticeable problems.

I don't use CC when going thru cities, but when on the open Interstate at 60 mph I use it. The book doesn't say you can't and the Cummins 6.7L diesel seemed happy with it.
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Old 09-17-2012, 05:47 PM   #3
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Perhaps personal preference as well as each ones comfort within the safety zone.I use mine primarily down the long stretch of I95.and have to admit that my Cummins seems to like it as well.Have never had any issues.Remember the big boys have them on their rigs as well.Of course this is just my .02 and in no way reflects the beliefs of my fellow RVers.
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Old 09-17-2012, 05:51 PM   #4
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If the truck doesn't shift much, and you are towing in the flats, I would think cruise control would be OK. I like to keep my truck in OD as much as possible, and cruise control in the hills around here is not practical. If I locked out OD, then maybe. But then the gas mileage drops. Even at that, I have to keep OD locked out much of the time, and I think cruise control would be searching for second to keep up speed on many hills. Just not an option for me here. I did use it some a couple of weeks ago in the flats of Indiana and Ohio.
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Old 09-17-2012, 06:09 PM   #5
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I use it in the flats outside of city's or heavy traffic. Like you said "normal conditions". No problems with my Dodge either.
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Old 09-17-2012, 06:47 PM   #6
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I dont think it is a good thing to use the cruise while towing. First no manufacturers recomend this and towing in overdrive is not a good thing for the transmission. It cause the transmission to hunt on and off causing more internal heat inside. If you have a 4 speed transmission the 3rd gear is the way to go.
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Old 09-17-2012, 07:10 PM   #7
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I use cruise control while towing everywhere that I would use it in my car! So not in the mountains, not in town etc. But out on the highway, I use it all the time; thousands of miles.

BUT, I do think it depends on your tow vehicle. If you have a fragile hold on your top gear, such that any slight hill causes a downshift, you might not want to use it. And Mtnguy is right that it doesn't necessarily work well where there are lots of rolling hills; the more frequent the worse it gets. And it DOES take more fuel to hold your speed in hills; especially if it forces a downshift. It IS more fuel efficient to hold your high gear and let it slow; then regain your speed on the downhill; in other words, no cruise.

But the bottom line is, there is no big reason not to use it. We now tow with an Ecoboost. The torque at low engine speeds allows the use of cruise most of the time; without a lot of shifting.
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Old 09-17-2012, 07:18 PM   #8
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I have used cruise but I did notice that my gas mileage suffered some under cruise. Truck performed well otherwise.
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Old 09-17-2012, 07:28 PM   #9
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Cruise worked great on my Ford. Till ya hit hills then take it off! I left it on and ended up with turbo overboost, engine cooling temp to oil temp ratio, and egr valve errors all showed up via the wrench light and check engine light. Bottom line was using cruise when towing on hills caused the beginning of engine meltdown. Buy hey that's what warranties are for. Like Clint Eastwood said.......A man's got to know his limitations.
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Old 09-17-2012, 07:37 PM   #10
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Let me get someone to clarify something for me.

What do you mean when you say you lock out overdrive?

I tow in D with the tow/haul on and with the CC on as well.

Truck: Ram 2500, 5.7 Hemi, 3:73 axle
Speed: hiway 60 mph
Trailer: Flagstaff 30WRLTS VLite
MPG: 8-10 but I can live with that

Yes, it does downshift when going up hills.

Been towing this way for years with no problem, yet.

If I am doing something wrong or there is a better way, I'm all ears!
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