Ecoboost axle ratio
Lead Driver
Joined: Jun 2005
Posts: 8,465
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From: Calgary Canada
It's been available in 3.15, 3.31, 3.55 and 3.73 in every model year, including the new 2015's. They also sold it in a 4.10 axle as part of the tremor package and on certain max trailer tow packages, although I'm pretty sure you could also get Max Tow with 3.73.
Doesn't look like the 4.10's are available on the 2015's.
Doesn't look like the 4.10's are available on the 2015's.
Super Moderator
Joined: Jan 2008
Posts: 40,024
Likes: 1,519
From: Maine, Virginia
The 3.15 is the base axle for the 4x2 and the 3.31 is the base for the 4x4. The 3.31 in a 4x4 will still get you about 9K pounds of towing capacity, not too shabby.
I'm very impressed with the 3.31's in mine but then again, my truck doesn't do much work beyond it's own weight. If I were working my truck as a truck then I would have opted for the 3.73's and understood that the lower MPG's are part of the deal for having a towing machine.
I'm very impressed with the 3.31's in mine but then again, my truck doesn't do much work beyond it's own weight. If I were working my truck as a truck then I would have opted for the 3.73's and understood that the lower MPG's are part of the deal for having a towing machine.
Lead Driver
Joined: Jun 2005
Posts: 8,465
Likes: 725
From: Calgary Canada
I too am very impressed with the 3.31. My previous truck had the 3.73's with the 5.4L engine, and while towing my 5000lb travel trailer, I can say with certainty that the new setup, even with the shallower gears, is so much more powerful and capable.
Just bought a larger trailer, will report back in the summer once I've put some miles on the new rig.
Just bought a larger trailer, will report back in the summer once I've put some miles on the new rig.
Senior User
Joined: Aug 2001
Posts: 383
Likes: 0
From: MA
This is my second Ford with 3.31 axle ratio. Based on my experience with the EXp with 5.4 and 3.31 I did not even consider another axle ratio as towing capacity with the 3.31 on the F150 is more than I will ever need. So far, I am very impressed with the 3.31, 6 speed trans and Ecoboost combination.
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Laughing Gas
Joined: Dec 2010
Posts: 1,200
Likes: 45
From: Timbuk3, MI
FYI ... There is no such thing as an ..."Ecoboost axle ratio".
.
-click- the pic'
Goth 150
< This space intentionally -blank- >
- EcoBoost is an engine assembly.
- EcoBoost is not a model, trim, cab, wheelbase, RAR, or nx4 drive selection.
-click- the pic'
Goth 150
< This space intentionally -blank- >
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Cargo Master
Joined: Feb 2007
Posts: 2,474
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From: ME
Did anybody say it was?
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
I think we all know what he meant. EcoBoost is a marketing name for types of engines. Considering he posted in the 2009-2014 F150 Forum, I think it's safe to assume he meant an '09-'14 F150 with the 3.5L EcoBoost engine axle ratio options.
http://en.wikipedia.org/wiki/Ford_EcoBoost_engine
http://en.wikipedia.org/wiki/Ford_EcoBoost_engine
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