Details

• Brand:

  

  

• SKU:

  L1MZ-4220-A

• Positions: Rear
• Other Names:

  Bearing Assembly Differential

• Description:

  This is a genuine Ford differential carrier bearing, catalogued under base number 4220, used in the rear drive unit of the Explorer, Police Interceptor Utility and Lincoln Aviator driveline. The bearing supports the differential carrier inside the axle housing, setting carrier location and preload so the ring and pinion stay in correct mesh as torque passes through the unit. As a core support bearing in the differential, it carries the load that keeps the gears aligned under power. Technicians replace this bearing during a differential rebuild, carrier bearing service, or when a howl, rumble, or whine from the rear drive unit that changes with load points to a worn or pitted bearing, or when metal contamination is found in the gear oil. Because it sets carrier preload, Ford supplies it as the correct service bearing matched to the application so the cup and cone provide accurate fit using factory shims. Built to Ford tolerances, it provides the proper bearing fit for correct preload and a direct installation without modification. Fitment covers the Explorer-platform rear drive unit across the 20-25 range; the base 4220 carrier-bearing meaning is confirmed across sibling releases on this driveline. Confirm the model, model year, and axle configuration against the Ford catalog before ordering, replace carrier bearings as a matched pair, and set preload and backlash to specification during assembly.

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