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Old 05-11-2016, 11:00 PM   #1
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When to use Tow/Haul

I have a Winnebago 31' Class C with a F450 engine. I am towing a 05 Jeep Wrangler about 3600 lbs. the OM for the RV advises to use the Tow/Haul button when pulling s load. They say it provides better shifting and also will slow you on descending grades. I tried the tow/haul and it Is quite impressive especially how intelligent it is on descents. My question is should I use it all the time when pulling my toad regardless of the grades I am traveling ? The OM also states that gas mileage will be reduced in Tow/haul, but I'm more worried about the tranny. Thanks for your thoughts.

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Old 05-11-2016, 11:26 PM   #2
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Location: Powell River, B.C.
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Because of the change in shift points ( slightly higher RPM ) on both up shifts and downshifting going up hills, fuel mileage will be reduced.
That being said if the manufacturer thought the trans wouldn't handle it , they wouldn't offer the program. The higher RPM moves the fluid , through the trans and cooler quicker ( better for the whole trans ) and the higher RPM keeps the torque converter cooler when the trans is in gears where the lock-up feature isn't available. Over all easier on the trans.

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Old 05-12-2016, 10:24 PM   #3
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Thank you, Skip426. The information really helps me understand why tow/haul option is important when pulling my toad. I have to admit the trans shifts that seem to take much longer and rev up the rpm's made me a little weary, but now I'll use the option with reassurance that I'm doing the right thing for the tranny. Thanks so much for taking time to educate me.
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