Ford F-250/F-350/F-450 Axle Size Guide

Ford F-250, F-350, F-450 Rear Axle Guide by Model Year (1999–2024) with Axle Tube Diameter and Differential Cover Bolts

1999–2000

  • F-250/F-350 SRW:

    • Axle: Ford Sterling 10.5" Rear Axle.
    • Axle Tube Diameter: 3.5 inches.
    • Differential Cover Bolts: 12 bolts.

  • F-350 DRW:

    • Axle: Dana 80 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 10 bolts.

  • F-450:

    • Axle: Dana 80 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 10 bolts.

2001–2010

  • F-250/F-350 SRW:

    • Axle: Ford Sterling 10.5" Rear Axle.
    • Axle Tube Diameter: 3.5 inches.
    • Differential Cover Bolts: 12 bolts.

  • F-350 DRW:

    • Axle: Dana 80 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 10 bolts.

  • F-450:

    • Axle: Dana 80 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 10 bolts.

2011–2016

  • F-250/F-350 SRW:

    • Axle: Ford Sterling 10.5" Rear Axle.
    • Axle Tube Diameter: 3.5 inches.
    • Differential Cover Bolts: 12 bolts.

  • F-350 DRW:

    • Axle: Dana 80 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 10 bolts.

  • F-450:

    • Axle: Dana 80 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 10 bolts.

2017–2022

  • F-250:

    • Standard: Ford Sterling 10.5" Rear Axle.
      • Axle Tube Diameter: 3.5 inches.
      • Differential Cover Bolts: 12 bolts.
    • Heavy-Duty Towing Package: Dana M275 Rear Axle.
      • Axle Tube Diameter: 4 inches.
      • Differential Cover Bolts: 14 bolts.

  • F-350 SRW:

    • Axle: Dana M275 Rear Axle.
    • Axle Tube Diameter: 4 inches.
    • Differential Cover Bolts: 14 bolts.

  • F-350 DRW/F-450:

    • Axle: Dana M300 Rear Axle.
    • Axle Tube Diameter: 4.5 inches.
    • Differential Cover Bolts: 14 bolts.

2023–2024

  • F-250/F-350 SRW:

    • Most Models: Ford Sterling 10.5" Rear Axle or Dana M275 Rear Axle.
      • Axle Tube Diameter (Sterling 10.5): 3.5 inches.
      • Axle Tube Diameter (Dana M275): 4 inches.
      • Differential Cover Bolts (Sterling 10.5): 12 bolts.
      • Differential Cover Bolts (Dana M275): 14 bolts.
    • Optional Axle (Some Packages): Ford Sterling 11.6" Rear Axle.
      • Axle Tube Diameter: 4 inches.
      • Differential Cover Bolts: 16 bolts.

  • F-350 DRW/F-450:

    • Axle: Dana M300 Rear Axle.
    • Axle Tube Diameter: 4.5 inches.
    • Differential Cover Bolts: 14 bolts.