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Old 08-22-2012, 11:05 PM   #1
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Tow haul ??

I have a 2012 Jayco Greyhawk, 32 ft. It feels like the engine is struggling to shift when I accelerate. I never heard of the tow haul feature until tonight when someone in the campground said it's better to drive with it on - flat highway or climbing mountains, he said it will assist the transmission as it shifts into higher gears. Does anyone know more about this? As I read the manual it says to use it to assist in down grade driving. ??
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Old 08-22-2012, 11:23 PM   #2
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Hi, "Tow/Haul " feature is a transmission shift program that holds each up shift until a higher engine RPM is reached; in order to better handle additional weight. Also part of the program is more rapid downshift to help the braking of the vehicle on hills.
I haven't driven a motor home with this feature, but noticed a big difference when driving a 3/4 ton that had it.
How many miles on your coach? Are you towing ? Have you weighed your unit loaded for travel ?
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Old 08-22-2012, 11:46 PM   #3
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I would say it helps the transmission into lower gears for more power and higher revs. If you are towing, climbing or have a bad headwind (any time you find the trans is seeking gears or shifting up and down frequently) you should be using it.

And it's great for decelerating
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Old 08-22-2012, 11:51 PM   #4
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Leaving it off on level ground or smooth sailing will allow it to use top gear which will give you lower rev and better mileage and less noise. Wouldn't use it unless experiencing frequent shifting up/down or if you see an upcoming hill
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Old 08-23-2012, 06:25 AM   #5
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Yup tow haul is great. It kind of acts like an Allison transmission. It will control shifting and engine/transmission braking in the hilly areas. I also turn it off in the flat areas.
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Old 08-23-2012, 01:15 PM   #6
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Hey, thanks. I have 3700 miles and yes I'm towing a Honda CRV. From what I understand now, I should be using it going uphill and downhill but not so much on flat. ? Thanks for your response!
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Old 08-24-2012, 06:01 AM   #7
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Forgot to mention, I use whether I'm towing or not. I figure these are fairly heavy RV's so it couldn't hurt.
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Old 08-24-2012, 12:21 PM   #8
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Ran it coming out of Yellowstone East exit (if you've ever been there). Almost straight down. Did not use the brakes very much at all.
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Old 08-29-2012, 06:23 PM   #9
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I use mine all the time unless I'm on a flat freeway.
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Old 08-30-2012, 04:51 PM   #10
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Use all the time when towing,helps with braking.Saves brakes in the mountains.
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Old 08-30-2012, 09:21 PM   #11
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I use it when slowing down and up hills towing or not. Slows the rig down with minimal break use and helps with the extra weight up hills. On the highway I shut it off based on my past experiences towing trailers. Works for me bit you may have a different experience.

Earlier in the summer a bunch of RV folks at a KOA were discussing it and based on the comments Above it appears user specific.
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Old 08-31-2012, 09:02 AM   #12
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I use mine mostly for going down steep hills and exiting the free way. Also in heavy city traffic.

Sometimes going up big hill and mountains.
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