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Old 11-11-2017, 09:39 PM   #29
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One day issue u need to keep in mind is - coming down a 6%-7% grade in a gasser....

Diesels all have an engine brake which uses engine compression to slow down the coach (which saves the transmission).... Your gasser will totally rely on its brakes and downshifting the transmission....

On this situation, you need to take tremendous care to not burn out brakes and overheat ur transmission....

Having owned a gasser before our current diesel, I can speak from experience... Nothing is more scary than overheated brakes as u descend a long winding mt road..... Been there - got the T-shirt....
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Old 11-11-2017, 11:45 PM   #30
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My Winnie Adventurer has the 8.1 workhorse and it also has an engine brake which made things a whole lot easier navigating those7% grades.
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Old 11-12-2017, 06:45 AM   #31
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No burnt out brakes on my gasser yet. Guess I know how to use it properly.
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Old 11-12-2017, 08:38 AM   #32
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Diesel. Engine Brake

Is Diesel engine brake a natural action or is it what's called a jake brake or exhaust brake?
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Old 11-12-2017, 12:04 PM   #33
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A Jake brake (engine brake) works on the valves and an exhaust brake works on the exhaust. Two different mechanisms.
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Old 11-12-2017, 04:02 PM   #34
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That's what worries me.... The motor rev's so high it sounds like it's preparing for take off. I know they're designed & engineered to today's tech but it can still be concerning to the average Joe. I too have a Ford V10 in my Vacationer. Only put a few miles on her so far, but soon will be hooking up a enclosed trailer to tow my GMC Yukon and head west. With that in mind those mountain give me concerns .
No engine benefits from hi rpm's if it sounds too high it probably is. I would shift to a lower gear and drop my speed accordingly. I would respectfully suggest you check the hitch on your rig. My 1999 Mountain Aire/Triton has a class II hitch and that is a 5000lb hitch. I would guess your Yukon weighs about 6000 with out the trailer. IMHO
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Old 11-12-2017, 05:36 PM   #35
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Might want to consider this option - disconnect the tow and drive it over the mt passes..... Takes a TON of extra weight off the coach going up and coming down......
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Old 11-12-2017, 05:47 PM   #36
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We had a 33 foot gasser with a 454 with banks kit. Towed a small SUV four down and had no problems with mountain roads on either side of the continent. Just remember to go down hills in the same gear you went up them in. The highway going south from Flagstaff to Phoenix I always do in second gear and my foot off the gas. 18 miles of 6% down is hard on the brakes and easier on the engine and transmission. Enjoy and drive safe.
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Old 11-13-2017, 02:44 AM   #37
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I have 83 Country Coach w/8.2 DD and Allison automatic. Is it best to use 2 nd gear after cresting hill and starting down hill? Using brake sparingly.
You should always use the lowest gear you can that will let you go down the hill without applying the brake if possible. On occasion even first gear will not do this and the brake must be used as sparingly as possible. Modern braking systems do not suffer heat as much as the older ones did but it is still good practice to find a gear that will allow minimal use of the brake pedal.

I pulled a large fifth wheel with a Silverado with an Allison and think is is the best tranny I have ever had. If you find you are going too fast for comfort down a hill just apply the brake and when your speed allows it the Trans will downshift and hold that gear.

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Old 11-13-2017, 06:28 AM   #38
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No engine benefits from hi rpm's if it sounds too high it probably is. I would shift to a lower gear and drop my speed accordingly. I would respectfully suggest you check the hitch on your rig. My 1999 Mountain Aire/Triton has a class II hitch and that is a 5000lb hitch. I would guess your Yukon weighs about 6000 with out the trailer. IMHO
All the numbers work out for CGVW, and towing hitch I just worry about cruising up and down mountains pulling an extra 10,000 lbs. I know the rig can handle it but that much weight can get out of control real quick. Like they say.. slow & steady
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Old 11-13-2017, 07:12 AM   #39
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You are going to need trailer brakes on that 10000#. Now you have two more braking axles to help and worry about. Been up and down the pass's in the west in the DPer before and now the C with no problem holding the weight back, just down shift to the gear needed. Both the diesel(allow over red line on braking) and the gas do go to high RPM but the trans temp seems not to be a problem.

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Old 11-15-2017, 09:04 PM   #40
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Not a problem. I took my 33' gasser with toad up a 16% grade into a county campground near Monterey, CA. A bit unnerving and slow, but no problem with power. Going down was more scary because of a 90 degree turn in the steepest part, but again, no problem.
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