Quote:
Originally Posted by Jim-n-Ash
Tylersdad, we don't actually know the rear-end ratio on our TV, though I suppose we could call Ford again with the VIN and find out. It's a 2008 F-150, King Ranch, and does not have the tow package. We got the weight distribution hitch and sway bar from the dealer before we brought it home. We're still fiddling the adjustment on the sway bar.
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It's on the sticker on the inside of the drivers door. There will be a letter like, E3 or something like that. It will tell you.
Rear Axle Ratio Codes
If you do not know the axle ratio of your vehicle, check its Truck
Safety Compliance Certification Label (located on the left front
door lock facing or the door latch post pillar). Below the bar code,
you will see the word AXLE and a two-digit code. Use this chart to
find the axle ratio that corresponds to that code:
Rear Axle Non-Limited Limited Electronic
Vehicle Ratio Slip Slip Locking
F-150 3.15 15 Not Available L5
3.31 27 Not Available L3
3.55 19 H9 L9
3.73 26 B6 L6
4.10 Not Available Not Available L4