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Multiplate Clutches

There are two Multiplate wet clutch packs; one forward and one reverse. Each pack has three friction plates providing six friction surfaces. Hydraulic pressure controls the clutches to allow the vehicle to move away smoothly regardless of the degree of throttle opening and by controlling the slip, allow the vehicle to be held stationary after a drive gear is engaged. Oil from the oil cooler is directed to the clutch plates to prevent overheating of the friction surfaces.

Fig 1: Multiplate Clutches
G04724777Courtesy of BMW OF NORTH AMERICA, INC.