NHTSA Complaint #10461854 — 2012 CHEVROLET IMPALA

I WAS ROTATING THE TIRES AT HOME. WHEN REPLACING THE WHEELS I STARTED AND SNAGGED THE LUG NUTS BY HAND. I WENT TO TORQUE THE LUG NUTS TO SPECIFICATIONS (100 FOOT POUNDS) USING A TORQUE WRENCH. ONE OF THE RIGHT FRONT LUG NUTS WOULD NOT STOP TURNING WAY BEFORE REACHING THE SPECIFIED TORQUE. AS I CONTINUED TO TURN THE WRENCH, THE STUD SNAPPED OFF. ONE OF THE LUGS/STUDS NEXT TO IT ALSO FELT SUSPICIOUS. I TOOK IT TO THE DEALER AND HAD ALL STUDS AND LUGS REPLACED ON THAT WHEEL AS I AM AFRAID THERE MAY BE A BAD BATCH OF STUDS. THE PARTS HAVE BEEN SAVED IF NEEDED FOR TESTING. I WAS A MECHANIC IN THE 1960'S AND HAVE BEEN DOING THIS WORK ON MY OWN AND FAMILY VEHICLES SINCE THEN. I CAN NOT RECALL EVER SNAPPING A STUD BEFORE. *JB