Multi plate Drive and Brake Clutches
WARNING: This page does not describe the selected car, but rather 43 other vehicles, including the 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, 2005 BMW M3, and 2005 BMW 330xi. However, it is still accessible from the selected car via links, so may be relevant.
Located in the main case are four drive and five brake clutches. When cushioned hydraulic control pressure is applied, the clutches engage smoothly with a slight delay. The valve body activates the various drive and brake clutches in a coded sequence to transmit engine drive torque to the planetary gear set providing the various output shaft ratios. The clutches are multiplate units with both steel and friction plates. The friction plates are single sided. See Fig 1 -Fig 3 .