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1biker1

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Posted: 07/29/20 09:52am Link  |  Quote  |  Print  |  Notify Moderator

when pulling a fifth wheel though the rockies or smokey's should you use cruise control, or down shift manually

1Wheeldrive

Highlands Ranch CO

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Posted: 07/29/20 10:09am Link  |  Quote  |  Print  |  Notify Moderator

Don't know what kind of a tow vehicle you have, but for my GMC Sierra/Duramax Allison when towing, I turn on the exhaust brake as soon as I start the engine and use the cruise control whenever I want to maintain a steady speed.
On down grades the speed may creep up to about 5 mph before the exhaust brake an downshift occur. On steep down grades I may have to touch the brakes occasionally.


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1biker1

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Posted: 07/29/20 10:12am Link  |  Quote  |  Print  |  Notify Moderator

2013 chevy 2500 6.0 gas

schlep1967

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Posted: 07/29/20 10:21am Link  |  Quote  |  Print  |  Notify Moderator

Read your trucks owners manual. It may tell you not to use cruise control when towing.


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Lwiddis

Near Annett’s Mono Village, Bridgeport, CA

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Posted: 07/29/20 11:03am Link  |  Quote  |  Print  |  Notify Moderator

I second schlep’s advice. Read and follow the owner’s manual.


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Dick_B

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Posted: 07/29/20 12:21pm Link  |  Quote  |  Print  |  Notify Moderator

The few times we have towed in the mountains we do not use cruise because the engine would be at 8000 rpm to keep the selected speed which I choose not to experience.
We bite the bullet and chug along at 45 mph going up hills but that's just my 6.1L Suburban.


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garyp4951

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Posted: 07/29/20 12:39pm Link  |  Quote  |  Print  |  Notify Moderator

I never use cruise towing in the mountains, and wonder why some do. I'm in no hurry, and its also hard on the power train.

Allworth

Orlando, FL

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Posted: 07/29/20 01:45pm Link  |  Quote  |  Print  |  Notify Moderator

Without the Allison tranny, it is a whole different game. Even the older GMs with Duramax/Allison (like mine) handle grades differently.

Your Owner's Manual is your friend.


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valhalla360

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Posted: 07/29/20 01:55pm Link  |  Quote  |  Print  |  Notify Moderator

Depends on where you are crossing them. Some of the lower/flatter crossings, it doesn't really matter.

On the steeper/twistier crossings, I prefer to keep control


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Lynnmor

Red Lion

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Posted: 07/29/20 02:21pm Link  |  Quote  |  Print  |  Notify Moderator

The information starts on page 9-59
It appears that you can use the cruise control to your benefit. If you don't want to go fast, and turn 8,000 RPM, (it won't do that anyway) just set it to the speed you want.





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