B&M Cast Aluminum Differential Covers are designed to strengthen the differential by preventing case distortion and ring gear & bearing cap deflection. Constructed of A356.0-T6 aluminum, these rugged covers significantly increase the fluid capacity and dissipate heat much faster than the stock factory unit to prolong the life of your ring and pinion gears. Additional features include an engraved B&M logo, drain and fill port locations, a magnetic drain plug for catching ferrous metal particles, and complete hardware and installation instructions.
  • Additional Oil Capacity
  • More Cooling Ability
  • No Dipstick Modification
  • Some Include Fluid Pickup Extension
  • Built-In Drain Plugs
  • Cast Aluminum
  • Check clearances for fit-Gasket Not Included

Application Summary:

Designed to fit most vehicles with Ford 8.8in. differential; however each vehicle may have other interfering components and adequate clearance and fitment should be verified prior to purchase/installation. Refer to ID guide and measurement diagram for specific dimensions.
AAM Long Description Cast Aluminum Differential Cover
AAM Short Description Differential Cover
AAM Standard Pack 1
Bolt Count 10
Bolt Pattern Ford 8.8
Bullet Point #1 A356.0-T6 Aluminum Construction
Bullet Point #2 B&M Logo Engraved
Bullet Point #3 Load bolts provide additional support to bearing caps
Bullet Point #4 B&M Quality
Call Out Size (in) 2.32
Carrier Main Cap Support Yes
Color/Finish Raw Aluminum
Country of Origin (Primary) US
Drain Plug Included Yes
Emission Code Legal US
Filler Plug Included Yes
Gasket Included No
Harmonized Tariff Code (Schedule B) 8708507200
Hazardous Material Code N
Life Cycle Status Code 2
Life Cycle Status Description Available To Order
Material A356.0-T6 Aluminum
MSDS Required Flag N
MSDS Sheet Number N
NAFTA Preference Criterion Code B
Package Contents Aluminum cover, fill & drain plugs, bolts & washers, load bolts & nuts, warranty
Position N/A
Thickness (in) 3.32

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B&M 40297 Cast Aluminum Differential Cover for Ford 8.8"

Product Information

  • Brand: B&M
  • Product Number: 40297
The AAM Group™ Proposition 65
Proposition 65 warning graphic (For California Residents)
WARNING: This product can expose you to chemicals including Chromium (hexavalent compounds) which are known to the State of California to cause cancer and birth defects; or other reproductive harm (For more information go to www.p65warnings.ca.gov)