Ford is known for building strong rear axle assemblies, most notably the 9-inch. But with the 8.8 ringing in at a strong second, it only makes sense for enthusiasts to modify them for more horsepower and torque. They’re a perfect unit to rely on for street/strip applications, and companies like B&M make components to beef them up.

Official Release:

B&M Differential Cover For 8.8” Mustang and Ford Applications (PN #40297)

This cast and machined differential cover for the very popular Ford 8.8” differential features heavy duty structural cooling fins, a thick ¾” lip for positive sealing and built-in bearing cap bolts for extra support, making the cover ideal for all performance applications, from daily commuters to all-out race vehicles. diffcover

Manufactured from tough aluminum alloy, the B&M differential cover combines extra fluid capacity for superior cooling with high strength, while a magnetic drain plug aids in inspecting and servicing your differential to help ensure long component life.

Below is the applications list from R&D. All the corresponding solid-axle Mercury and Lincoln vehicles should be added (Grand Marquis, Marauder, Navigator, Aviator, etc.). Made in the USA.

  • FORD Mustang 1986-2013
  • FORD F-150 1983-2013
  • FORD Ranger 1983-2011
  • FORD Explorer 1991-2001
  • FORD Bronco 1983-1996
  • FORD Thunderbird 1987-1997
  • MERCURY Capri 1986


  • Heavy duty structural cooling fins
  • Thick ¾” lip for positive sealing
  • Ideal for all performance applications, from daily commuters to all-out race vehicles