2007 TOYOTA TACOMA. CONSUMER WRITES IN REGARDS TO SUDDEN VIBRATION WHEN VEHICLE WAS AT A STOP. *SMD THE CONSUMER STATED THE VEHICLE WOULD IDLE REALLY LOW. WHEN HE TURNED ON THE AC, THE IDLE WOULD INCREASE AND THE TRUCK WOULD STOP VIBRATING. ALSO, IF HE PUT THE VEHICLE IN NEUTRAL, THE RPM WOULD INCREASE AND IT WOULD STOP VIBRATING. THE CONSUMER STATED HE CHECKED UNDER THE VEHICLE, BUT DIDN'T SEE ANY VISUAL LEAKS. AS HE PROCEEDED TO SLIDE FROM UNDER THE TRUCK, THE FRONT TIRE ROLLED OVER HIS HEAD AND CHEST. THE TRUCK ROLLED ACROSS THE STREET AND HIT A STREET SIGN. THE CONSUMER STATED HE AND A FRIEND RE-CREATED THE INCIDENT. THE CONSUMER STATED WHEN THE FRIEND TOUCHED A LINKAGE, HE SAW THE SHIFTER MOVE TOWARD THE BACK OF THE TRUCK, STAYING IN THE SLOT FOR PARK. THE TRUCK THEN ROLLED WHILE MAKING A CLICKING NOISE. THE CONSUMER APPLIED THE BRAKE AND THE TRUCK STOPPED, HE PUSHED THE SHIFTER FORWARD AND THE TRUCK RE-ENGAGED INTO PARK. THE CONSUMER STATED HE COULD ONLY RE-CREATE THE PROBLEM, WHEN THE VEHICLE WAS PARKED ON AN INCLINE. THE CONSUMER STATED WHEN THE VEHICLE WAS PARKED ON A SLIGHT INCLINE, IT HAD THE ABILITY TO POP OUT OF PARK BY SLIGHTLY TOUCHING THE LINKAGE UNDER THE TRUCK. UPDATED 07/23/13*LJ