I got a 05 singlecab with the 4.6. I want to go bigger but not sure if its a smart idea. I have a 6 inch with 35's now but i want to put a 2.5 inch spacer up front and go to 37's can this motor and axle set up handle that.

 

Im running 37's with minor rubbing on front valance. I do need to get a programmer because my message center says Im getting 8.3MPH

 

You'll need to regear if you want the truck to be useful for anything. At least 4.88's.

 

i have 37s and a 4.6l with gears and a tuner its still faster then stock. i have 4.88 gears but i wish i would have gone 5.13 f*cking truck shop talked me out of it

 

yeah i figured the re gear and i already have programmer, exhaust, and intake. I was just worried about the 4.6 being the problem but sounds like you guys are doing ok with it.

 

With the right gears any engine is fine. My buddy has a Toyota with a 4 banger and 40" boggers, he usually places in mud bogs against big V8's, and sounds like a pissed off squirrel when he does it