Something is clearly wrong.
Lug nuts do not come loose if they are properly tightened.
BUT keep this in mind, not sure what you did during the rear brake job, were rotors replaced? Is the inside face of the rotor fully seated on the hub? Did the parking brake shoes cause a problem with the rotor seating on the hub flange?
I can only assume if the lugs were tightened, something is not fully clamped and moving around. Maybe the wheel center diameter is too small? Clamp load is the important piece of anything being properly tightened.
You might put a piece of printer paper over the hub/lug area as a test, tighten the wheel and see if the wheel flange and the face of the rotor actually come in full contact. I assume you should see embossed marks on the paper if the wheel hub is fully tight against the rotor hat face.
Also double check your torque wrench, I have seen many cases where torque wrenches are way off. Use your lug tool in the rear compartment to verify that the lugs are actually getting tight.
You could get one of these to verify the torque wrench accuracy.
ACDelco ARM602-4 1/2-Inch Torque Measurement Adapter 4-147.6 ft-lbs - Torque Wrenches - Amazon.com
11-16-2015, 02:42 PM
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