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60mph in 5th gear when towing travel trailer?

 
Old 05-26-2019, 10:35 AM
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Default 60mph in 5th gear when towing travel trailer?

I have towed my trailer (7000#) numerous times with no problem reaching 70-80mph. We have a vacation to the mountains planned in a week and now I canít go over 60mph when towing the trailer. Iíve only been reaching 60mph in 5th gear then it downshifts to 4th and the rpms are 3000. Sometimes it will skip 4th and go from 5th to 3rd and the rpms get even higher. I took it in for a recall with 2011 models about 2 weeks ago where I think they flashed it. Could it be from that? Iím not getting any codes and it drives fine when not towing, no overheating or anything. Iím at a loss here.
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Old 05-26-2019, 12:36 PM
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Need more information, What engine and what gearing? How many miles on it.
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Old 05-26-2019, 08:35 PM
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Assuming it's an '11 w/ 3.5 Eco and 6 speed, 60mph will only net you 5th gear. You'd have to find a nice small, downhill grade (1 or 2%) at 60mph to reach 6th gear. If it's the 5.0, forget 6th and let 'er rev.

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Old 05-26-2019, 09:01 PM
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Sounds normal. 5th and 6th are both OD. Nothing at all unusual about not running in OD when towing.
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Old 05-27-2019, 05:44 AM
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Originally Posted by marshallr View Post
Sounds normal. 5th and 6th are both OD. Nothing at all unusual about not running in OD when towing.
And it's typically not good to tow in OD gearing. Not good for the trans and dif
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Old 05-27-2019, 06:19 AM
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If Ford engineers thought it bad to tow in high gear, they would make it lock high gear out when you set it in Tow/Haul.
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Old 05-27-2019, 08:49 AM
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Also probably exceeding the speed rating for the tires unless you've upgraded the tires.
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Old 05-27-2019, 10:37 AM
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If Ford engineers thought it bad to tow in high gear, they would make it lock high gear out when you set it in Tow/Haul.
They do think it bad to tow in high gears. Older Ford trucks, and most other manufacturers do lock out OD when in the tow mode. Newer trucks will rarely let the truck shift into the highest gear when in tow/haul mode. It performs exactly like the OP stated, which is normal when towing. Just another way to accomplish the same thing. I just prefer to read the road and lock out the higher gears before the engine starts straining. I find that by downshifting early it is easier to maintain speeds going up inclines rather than to wait for the transmission to do it after I've started losing momentum.
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Old 05-27-2019, 08:53 PM
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Just towed my 5500 lb. travel trailer in hilly area for 200 miles . I have a 2015 3.5 ecoboost with max tow and 3.55 gears. Put it in tow/haul mode and set the cruise on 62 mph on the interstate and let it do its thing. Runs in 6th gear on flat road and slight incline with no problem. A little steeper it will drop to 5th. Temperature stays nice and steady. Also got 12.4 mpg.
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Old 05-27-2019, 10:01 PM
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If the op ever returns and gives the truck info, would be great to give an idea. Since he stated that prior to the recall, which BTW is for all trucks with 6 speeds, that prevents it from slamming into first gear at highway speeds, it sounds as though the update mucked up something. Sort of reminds me of the 5.0/3.31 gear issues others had in the 09-14 MT threads.
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