If only one wheel is locking, check for leaks from the axle seal and from the wheel cylender. If fluid gets into the brake drum, it will lock up. Also, check to make sure none of the retaining springs have broken and the brake shoes are not glazed.
Jan 13, 2011 at 8:12 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.