I am looking into going from my 3.55's to 4.10's in my '05 f-150 Supercab 2wd 5.4 and was wondering what rear end I have. I know the gear shop is going to ask me for this info to order the gears. Any help will be greatly appreciated.

 

you most likely have the 9.75 with the 5.4, but just to make sure you could read the axle tag on the door sticker or look on the tag on the cover of the differental,

 

Thanks for the response. The door tag shows the axle to be an H9. I will probably just look at the axle tag in the morning and count the bolts to make sure.