I believe i have a standard brake system on my F150 xlt w/5.4 since the rear code on the axle is a b6 and was 9.75w/ 3.73 gears and the limited slip. So does that mean i have a light duty break system. Just need to know need to order up my new rotors and pads today.

 

I think you're refering to the "heavy payload package". If so, then that has nada to do with your axle code.

The easiest way to determine if you have the payload package is to count your lug nuts.
6 lugs = standard payload
7 lugs = heavy payload package

If I'm completely wrong about your inquiry, then I apologize.

 

I think you hit the nail on the head. thats what i needed to know i will pull off the lug nut covers tonight. that 7 lug must be hard to get aftermarket rims for.

 

You're welcome.

And YES, from what I've heard, 7 lug wheels OEM or aftermarket are tricky to find.

 

such an oddball lug pattern too...it is like ford half a** it