You have a rear wheel cylinder (maybe both) that has failed. Some times, it has locked up on you. When this happens, the brake shoes are pushed out against the drum causing the wheel to lock up and you can't move. When this happens, your parking brake lever will lose its braking ability because the shoes are already pushed against the drum.
If the rear brake has not been serviced for the past a couple years, I would do a complete rear brake service. Replace the shoes and spring kit. You may get away with re-surfacing the drums (rather than replacing them), replace both wheel cylinders and make sure that the brake system bleeding is done.
Thursday, January 22nd, 2009 AT 10:27 PM