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Transmission Cases and Pan

Made of aluminum alloy, the cases are light weight. The single piece oil pan is made of single wall sheet metal. It includes a drain plug on the bottom surface at the rear. The oil pan is mounted to the main case by 20 bolts. Oil pan sealing integrity is ensured by a controlled compression gasket. Cross tightening is required to ensure an even seal. Final torque of pan bolts is 10-12 N.m. See Fig 1 .

Fig 1: Identifying Transmission Case & Pan
G00317109Courtesy of BMW OF NORTH AMERICA, INC.