SAC Clutch

The SMG II operates with the SAC clutch used in the S54B32 manual gearbox.

The pressure force of the pressure plate over the driving disc onto the flywheel remains the same over the clutch's entire operating time.

The release force is likewise the same over the operating time. The shift quality in the SMG II thus remains the same.

Fig 1: View Of Self Adjusting Clutch (SAC)

Courtesy of BMW OF NORTH AMERICA, INC.

Workshop Hint 

FC 68 Indicates discrepency between input and output speeds in relation to gear engaged. Clutch is slipping.