I'm currently riding a 07 F150 XLT. I have the 8" suspension lift with 35" tires. I'm thinking about moving up with a 3" body lift and maybe some 38's. Anyone know what fuel damage I can be expecting? And what gears would be best to add?
thanks

 

welcome to the site!

I would go with 4.88's or even 5.14's....depending on what type of driving you do.

 

First of all Welcome to the Forum.

You are lifting a truck and installing a lower gear in it and you are worried about gas mileage??!?!?!?!?!?! Come on..
I agree with him on the gear set though. I use the folowing method on a full size ed truck stock- 3.55/3.73 33's- 3.90 35/36's- 4.11 38/39's-4.56. That is to keep the stock feel now to give more ooomph off the line go to the 4.88's. I think that will be perfect. Getting too low a gear is not good for street driving.