Sweatmachine

You should test drive them both. 20s & 3.31s is going to be a turd. I have 18s and 3.31s and I'm paying $1000 to swap for 3.73s. I'd track down a sport package with different gears, or have the dealer work with you on swapping the gears.

Chino86

Would those 3.31's be the cause of my poor gas mileage? (Im not too sure as to what gears I have, the porters threw the window sticker away when I bought it) I have a 5.0 sport with the 20's and am getting 13.1 mpg according to the truck. That's what I was getting with my 13 Eco 4x4 with 305/55 trail grapplers...

Matt 2010

I wouldn't think it would make that much of a difference with stock street tires. I have 3:55's with 18's now and seems to be a good combo.
thanks

Sweatmachine

I have 3.31s and 18s and I average around 15-16 mixed driving. The 20s will get worse mileage because they're larger and heavier.

Here's a way to generate your window sticker. All you need is your VIN and you can see what gears (and everything else) your truck came with:


Enter your VIN # after the "vin=" in the address bar and it generates your window sticker with all of the specs of your truck

http://fordlabels.webview.biz/webvie..........&ref=VL

LSchicago

Here's my 13 F150 STX 2WD 5.0 with 3.55's.

Chino86

Thanks! I'll check it when I get home from work 👍 I have under 1000 miles so I'm hopin the mileage goes up a bit since I wanna put some beefier tires down the road.

camz

I special ordered mine with 3.73 and rear locker

Matt 2010

Nice! That's the one I'm looking at.

Chino86

Man that looks nice! I wish I would've gone with a white one.

camz

^ thanks guys ^