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I have a '14 FX4 with the 5.0. I tow a 5k lb boat/trailer, and I'm wondering about the gears in mine. I bought the truck with 10k miles on it, so I'd rather not just look up the stock info, because there are a LOT of aftermarket mod's on my truck, including 6.5" lift and 35" tires. Is there any way to know by looking at mph to RPM ratio?
With the Eco, you will be fine with the 3.55's. I have 3.55's running 295/65's and pull 8,500 lbs. I do run a mild tow tune, but it pulls like an angry mule. 70 mph is 1800 rpm in 6th and 2200 rpm in 5th. 2000 rpm in 6th gear is 78 mph.
Well they did about $8k worth of aftermarket parts, and it seems really punchy off the line for a truck with 35's on it. But then on the highway going up hill it seems to bog down and downshift a lot. That's what confuses me. Off the line it's quick, but sluggish in 6th gear on the highway.
Gear swaps really aren't that common in terms of aftermarket parts. Doubt someone did a gear swap with just 10k miles on it too. Just look at the code on the door sticker. (Stage3Motorsports site) 15: 3.15 ratio, open differential 27: 3.31 ratio, open differential 19: 3.55 ratio, open differential 26: 3.73 ratio, open differential H9: 3.55 ratio, limited-slip differential B6: 3.73 ratio, limited-slip differential L5: 3.15 ratio, electronic locking differential L3: 3.31 ratio, electronic locking differential L9: 3.55 ratio, electronic locking differential L6: 3.73 ratio, electronic locking differential L4: 4.10 ratio, electronic locking differential
Thanks for listing all that...and I checked my door and sure enough....my axle code is L6. Hallelujah! I'm pumped. So glad I saw this thread and checked it out.
Well hell. I called to make an appt to see it and it's gone.
Interestingly, he said the used car manager sent it to auction yesterday because it had a recall on the airbags and it was going to be 3 months to get parts. He couldn't sell it and didn't want to let it sit that long.
So the search continues.
See if they can get it back, if you like it it might be a potential sale and they won't have to take a risk at auction.
Thanks for listing all that...and I checked my door and sure enough....my axle code is L6. Hallelujah! I'm pumped. So glad I saw this thread and checked it out.
Then you're set for just about anything really. And if you really want some power, a custom tune really wakes up the ecoboost. More so than the NA engines.
Then you're set for just about anything really. And if you really want some power, a custom tune really wakes up the ecoboost. More so than the NA engines.
I have the 6.2L engine in mine but I hear that a tune really helps in my case as well...I might wait a bit and see as I don't mind how it runs now. I have to fix the shudder on take off/braking before I try to add more power....haha
05-19-2016, 06:24 PM
Now I'm curious...
