Metric Mechanic’s Differentials Other drivetrain information

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BMW Differentials come in three sizes which are classifi ed

by the ring gear outside diameter measured in millimeters.

An overview of their use follows:

Small Differential 168 mm

Generally used behind 4 Cylinder engines

Medium Differentials 188 mm

Generally used behind Small and Big Six engines

Large Differentials 210 mm

Generally used behind early M5, M6, V8,

V12, some early 7 Series and E 46 M3 engines