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If you have access to the truck look at the GVW rating sticker on the door. (the black on white one, not the yellow tire one) or get them to send you a picture of it.
There is a diff code there.

Look in the towing guide pdf for what the codes mean.
2013 Ford F-150 | Download a Brochure | Ford.com
This is exactly what I needed. So I have L6 so 3:73 so NOT max tow. Only 9500. Hmm. What better highway gears then not pulling? 3:73 or 4:10



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'12 XLT w/ options (our minivan)
 

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your lower gear ratio will be better on highway because of lower cruise rpm
i have 3.55 in my 2013 XLT and a friend of mine has 4.10 in his 2012 FX4
i average around 18-19mpg and 17.5 when im horsing around he gets 15 most of the time and can get 17 if he drives conservative
 

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your lower gear ratio will be better on highway because of lower cruise rpm
i have 3.55 in my 2013 XLT and a friend of mine has 4.10 in his 2012 FX4
i average around 18-19mpg and 17.5 when im horsing around he gets 15 most of the time and can get 17 if he drives conservative
O so I'm kinda in the middle. Ok that's not bad. I got a pic of my speedo once. 125 km/h up 5% grade @ I think just under 2500 rpm. On cruise control.
 
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