Thread: Gear ratio???
View Single Post
  #9 (permalink)  
Old 05-19-2008, 05:47 PM
F550Haulin F550Haulin is offline
Member
  

Join Date: May 2008
Location: Southern Illinois
Posts: 65
I have an 03 with 4.88 rear I turn about 2700 at 75mph. Then again I have an F550. I have been wondering what it would do if I switched the 4.88 to a 4.55 what that would do to my mileage. I get 13mpg now.
Reply With Quote