Speed Dependent Damping Control (also called SD²C) was an automatic damper system installed on late-1980s and early-1990s Cadillac automobiles. This system firmed up the suspension at 25mph (40km/h) and again at 60mph (97km/h). The firmest setting was also used when starting from a standstill until 5mph (8km/h).

Applications:

• 19891992 Cadillac Allanté

Computer Command Ride

The semi-active suspension system was updated as Computer Command Ride in 1991. This new system included acceleration, braking rates, and lateral acceleration to the existing vehicle speed metric.

• 1991 Cadillac Fleetwood

• 1991 Cadillac Eldorado

• 1991 Cadillac Seville

• 1991 Cadillac De Ville (optional, standard for 1993)

• 1992 Oldsmobile Achieva SCX W41

References