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Old 08-21-2012, 11:09 AM   #1
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New (to us) Ecoboost with 3.15 Gears

We've been researching 1/2 ton trucks and liteweight travel trailers for two years as we entered retirement ready to do some long-awaited traveling.

After months of research and test drives, we narrowed the truck down to the Ford Ecoboost and last month purchased a 2011 F-15- Supercab with the Ecoboost engine and a 3.15 rear end. We live in the country, and have averaged 23MPG over the past six weeks. We're extremely happy with the truck, but have yet to pull a TT. The 3.15 rear brings the tow rating down from 11,300 (max tow package) to 8,600 (standard tow package).

Fast forward to yesterday: We signed the papers for a 2013 Flagstaff 26WRB with a dry weight of 5805 lbs. Looking forward to picking it up next week

Has anyone here towed using the 3.15 gears? Just looking in advance to see what we can expect.

Thanks in advance...
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Old 08-21-2012, 11:25 AM   #2
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Hello, and to the forums. Hope you enjoy the stay, and learn a lot, and can teach others what you already know. Congrats on the truck and trailer. As for towing, there is a long thread on the Ecoboost somewhere.

Here is one thread: New (to us) Ecoboost with 3.15 Gears

And another: Ford 150 Econoboost Engine

A search on here will get you a lot of reading. Sorry, I haven't read them all as I'm in the market for a 250 with the 6.2 liter V8.
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Old 08-21-2012, 11:26 AM   #3
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Good luck! IMHO you got probably the worst gear ratio for towing. While it is great for unloaded traveling, once you get all loaded up with that trailer you will likely be very close to the trucks tow rating. You do have to remember that the tow rating is based on a base level truck no options and one 150 pound driver. I would suggest that you load the truck up like you will be traveling and get to a set of scales for an accurate weight. Subtract that number from the trucks published GCWR numbers. That is the maximum load you can tow.
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Old 08-21-2012, 11:29 AM   #4
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Great advice! Thanks much...
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Old 08-21-2012, 11:41 AM   #5
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Unfortunately 355 gears would have been better for getting max tow weight.
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Old 08-21-2012, 11:55 AM   #6
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Too late the rookie learns, but I'll make the best of it. The truck GVWR is 7050 lbs and the TT dry weight is 5805.

Think we'll be close, for sure. Fortunately, our combined individual weight is well under 300 lbs. I'll get to the nearest scales this weekend to see if it is workable. We don't pick the camper up until the 31st so there's still time to consider a lighter trailer, (under 5,000 lbs. maybe...) Hope we can make this work; however, as the wife is in love with this particular TT.
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Old 08-21-2012, 12:19 PM   #7
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You may just have to lock out 6th gear, as I imagine it might be struggling with the camper behind. What kind of RPM does the engine turn when you are doing 60 mph?
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Old 08-21-2012, 12:22 PM   #8
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I have the 355 gear and a 7000 lb trailer (unloaded). Love my Ecoboost.
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Old 08-21-2012, 01:09 PM   #9
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Quote:
Originally Posted by Scratch View Post
Too late the rookie learns, but I'll make the best of it. The truck GVWR is 7050 lbs and the TT dry weight is 5805.

Think we'll be close, for sure. Fortunately, our combined individual weight is well under 300 lbs. I'll get to the nearest scales this weekend to see if it is workable. We don't pick the camper up until the 31st so there's still time to consider a lighter trailer, (under 5,000 lbs. maybe...) Hope we can make this work; however, as the wife is in love with this particular TT.
Is it a 4X4? If not you might check into a gear swap. If it is, it my not be worth the cost.
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Old 08-21-2012, 01:14 PM   #10
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Quote:
Originally Posted by Len & Cheri

Is it a 4X4? If not you might check into a gear swap. If it is, it my not be worth the cost.
I'm with Len ! If it's a 2 wheel drive it might be worth the expense.
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