2018 Toyota Highlander Suspension Problems

UNKNOWN, squeaking in rear when going over bumps and uneven roads

VEHICLE WAS IN PARK AND ROLLED. IT PICKED UP SPEED AS IT CONTINUED TO ROLL AND THERE WEREN'T ANY OCCUPANT. THIS TOOK PLACE IN A DRIVEWAY. THE VEHICLE ROLLS WHILE THE EMERGENCY BRAKE IS ON ALLL THE TIME AS WELL.

LAST YEAR 02/22/2018 /3,168 MILES, I HEAR A BANG/NOISE FROM REAR OF MY HIGHLANDER ROAD ROUGH ONLY THEY FIXED. THIS YEAR 07/102019 /12,780 MILES SAME PROBLEM

WHEN HIT BREAKS HARD... I HEAR A BANG/NOISE FROM REAR OF MY HIGHLANGER. ( DEALERSHIP ADMIT THIS IS ABNORMAL SOUND BUT THEY CAN'T DO ANYTHING ABOUT IT). TRANSMISSION SHIFT ROUGHLY, NOT SMOOTH SHIFTING. IF CAR IS IN DRIVE AND IM HOLDING BREAKS CAR REAR STARTS MAKING BANGING NOISE N START SHAKING. SO FAR MY CAR HAS ONLY 20K MILES ON IT . SUSPENSION IS PRETTY STIFF DOESN'T HELP WHILE DRIVING OVER POST HOLES.

TOOK MY 2018 HIGHLANDER TO HAVE THE 5000 MILE SERVICE DONE. UPON ENTERING THE SERVICE DEPARTMENT I SPOKE WITH ONE OF THE CERTIFIED TECHNICIANS. I TOLD HIM MY VEHICLES IS PULLING TO THE LEFT. THEY THEN DID A ALIGNMENT AND TIRE ROTATION. AFTER LEAVING MIKE WOOD TOYOTA OF UNIONTOWN I NOTICED THAT MY VEHICLE WAS NOW PULLING TO THE RIGHT. WHEN I GOT HOME I EXAMINED THE TIRES CLOSELY ONLY TO NOTICE THE TIRES WERE CUPPED AND STARTING TO FEATHER OUT ON THE INNER AND OUTTER EDGES. I THEN SCHEDULED ANOTHER APPOINTMENT TWO DAYS LATER SHOWING THE DEALERSHIP SERVICE DEPARTMENT MY FINDINGS. THE SERVICE TECH GOT IN AND TOOK A RIDE WITH ME. HE ALSO DROVE MY 18 HIGHLANDER. HE OBSERVED MY VEHICLE PULLING AND THE CUPLING AND FEATHERING OF MY TIRES. HE STATED THAT THE TIRES SHOULD NOT HAVE DONE THAT IN 5000 MILES. I AM WAITING NOW TO SEE IF TOYOTA IS GOING TO REPLACE MY TIRES. OR IF THE TIRES ARE DEFECTIVE