JESSE1
Veteran Member
We bought a new '88 F-Super Duty that had a 7.3 idi diesel and 5 speed manual trans. You could only get a 5.13 axle ratio with the diesel. If you had a 460 gas engine you got the 4.88 ratio. The F-Super Duty was a new model that later became the F-450. Had a solid front axle like an F-650.