Rear Diff Cover for Dana M300 Ford F350 and F450 Dually

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The Motobilt M300 Heavy Duty Diff Cover is designed and fabricated with strength and style in mind.  Like our other differential covers the M300 version is laser cut from 1/4” steel and formed to fit on the 3/8” thick steel ring. The covers are welded inside and out.  The fill plug is a 3/4” NPT thread and uses a 9/16” Allen wrench to install and remove. The covers ship with mounting hardware. The doff cover is shipped bare steel ready for you to paint or powder coat to the color of your choice.  We do stand behind our diff covers with a lifetime warranty.  If you damage it or ever have issues with a Motobilt welded diff cover just contact our sales staff.  Keep in mind we do not warranty the DIY versions of our diff covers. 

The Motobilt M300 diff cover fits 2017-22 Ford F-350/450 DUAL REAR WHEEL rear axles.


  • Fits  2017-22 Ford F-350/450 DUAL REAR WHEEL rear axles
  • cut outs for sensors in rear axle housing
  • 1/4” steel shell
  • 3/8” steel ring
  • mounting hardware included
  • Includes a fill plug
  • laser cut and CNC formed in house a Motobilt in the the USA. 
  • Lifetime Warranty