My ''08, just like yours, has always been able to lock up the rear wheel. That being said, it's not a good idea. It only happens to me in trying to avoid an idiot what has pulled out in front of me. Some, not all, drums are not round and/or the break pad is not concentric with the drum,, and measures should be taken to make them fit (mesh) properly. Then your breaking will be good. If you have low mileage they will most likely wear in over time.