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Ecoboost mileage w/ 3.15 gear

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Old 01-25-2012, 10:30 AM
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Originally Posted by gaiusgracchus
You guys sound like you know a lot about trucks. We just got a camper trailer (4000 lbs loaded) but are towing it with a 2011 Tacoma 4.0 v6 Prerunner TRD off road w/tow package - max 6500 lbs.

We are wishing we had gotten a Ford F150 EB. Tacoma can pull it, but it really slows down on the hills. We are new to towing, and scared ourselves silly skidding to a stop down a road with mild slope one day. The truck weighs slightly less than the trailer - maybe not a good thing. Wheelbase is less than the F150 - seems a bit less stable.

Anyway, we are checking out this thread because we are shopping for a Ford. So most of the posts we are reading say if you want to tow a lot you should go with the 3.73 axle ratio. But this thread indicates maybe we would be ok with the 3.55. We are having a very hard time even finding 3.73s anywhere within 600 miles (supercabs, anyway). The dealers are indicating that the 3.73 is so popular they can't keep them in stock.

We will be towing all the time all across the country.

You guys have experience towing -- do you think the EB 3.55 would be almost as good as the 3.73 for 4000 lbs?

Thanks!
kalyson
I have the 5.0 with the 3.55's, and towing those weights around is a breeze. As a non-EB driver I would support what the above ^^ posters stated regarding the EB and 3.15's being fully capable to tow those weights as well, and you get the added bonus of better highway mileage when not towing. Beyond 5-6000lbs.+, the 3.73's would certainly be appreciated for any Ford engine choice.
Old 01-25-2012, 12:12 PM
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Thanks so much, guys. We are new to all of this stuff. The dealership folks will say anything, so it is great to hear from people with real-world experience.
Old 01-25-2012, 01:51 PM
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11 EB SCAB 3.15 open rear. I get about 21 on the highway and 18-19 around town. Very hilly terrain though. I have the Ford brake controller as well. Tows my 21' Gambler bass boat like it's not even back there. No lugging. Pulls strong and fast. Beats the **** out of my old Titan.
Old 01-24-2015, 12:27 PM
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Default Information still relevant in 2015

Loved reading this old thread. Information posted is still relevant in 2015. The 2015 Ecoboost 3.5L with 3.15 gears is rated to pull, by Ford, 10,700 lbs. and should get the best mileage. Seems like everyone still wants the lower gears and many still complain about mileage. Not sure why the standard higher gear is discounted so easily. Seems like might be old thinking or habit.

I think the posters in this thread were ahead of their time.
Old 01-26-2015, 12:34 PM
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I have a 2013 Lariat with 3.31 gears. I've taken two 3200 mile trips with it since purchase. I found that if I keep it between 65 and 70 I get 24 mpg and at 60 to 65 I'll get 25 mpg. A friend of mine has 3.15 gears and he gets just a little more than I do. I was well aware of the mpg difference with the different gears and I would of bought the 3.15 if I could of found one in the trim level I wanted.
Old 01-27-2015, 09:27 PM
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Originally Posted by Dan M.
I have a 2013 Lariat with 3.31 gears. I've taken two 3200 mile trips with it since purchase. I found that if I keep it between 65 and 70 I get 24 mpg and at 60 to 65 I'll get 25 mpg. A friend of mine has 3.15 gears and he gets just a little more than I do. I was well aware of the mpg difference with the different gears and I would of bought the 3.15 if I could of found one in the trim level I wanted.
That's great mileage. Who needs aluminum?

Towing anything?
Old 02-02-2015, 07:54 PM
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Originally Posted by zx12-iowa
Note that a lot of these mpgs are with southern 2wd trucks. They don't have to move the 4wd hardware. If you off road or tow, the low gears are no good. You want great mpg, drive a Prius. Most with an f150 don't use it as designed....


Your right and the Key word southern.. I get 24 hwy in summer im lucky to get 21mpg in the winter..
Old 03-08-2015, 12:58 PM
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I am currently getting 14.4L/100kms after my tranny flash, before it was terrible @ 25L/100kms.
Old 03-08-2015, 01:09 PM
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I have a 2014 fx2 luxury package w/ 3.15 gears. only have about 600 miles so only getting about 18.5-19.7. So, only on my 2nd fill up and breaking in. I am sure the miles will go up- but this is split 60/40 highway and city
Old 03-28-2015, 01:15 AM
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Nice to read new (2015) comments in this old thread. Would love to read more tall gear towing experiences. I'm still amazed that the 3.15 axle is rated to tow around 1000 lbs more than last year's 3.55 axle, and nearly the same as the 2015 5.0 with the 3.73 axle. I'm looking forward to respectable gas mileage and a 10,700 tow rating when my order comes in.


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