Ford Probe Owner's Manual page 41

Automatic console-mounted gearshift lever
NOTE: When the ignition key is in the ACC
or LOCK position, the transaxle cannot
be shifted from the P (Park) position.
If the brake pedal is repeatedly
depressed and released when the
ignition is in the ON position and the
selector lever is in the P (Park)
position, a chattering near the gearshift
lever may be heard. This is not a
malfunction.
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