Centrifugal apply: The unintentional and unwanted application of an automatic transmission clutch pack that is supposed to be released caused by residual ATF moving to the outside of the drum's inside diameter under high RPM's.
– An automatic transmission clutch pack consists of multiple alternating disks that fit inside a metal clutch drum. To effect gear changes, one of two types of clutches or bands are used to hold a particular member of the planetary gear set motionless, while allowing another member to rotate, thereby transmitting torque and producing gear reductions or overdrive ratios. There are multiple automatic transmission clutch packs in your car. There is usually one clutch pack for each shift of the vehicle or speed of the vehicle.