Turn the rear driveaxle nut loose. First, loosen all four wheel lug nuts. After that, put blocks in front of the front wheels. Lift up the car from rear axle to jackstands. Remove the rear wheel. Squeeze the arm that controls the parking brake cable until it gives you room to work with. The Legacy's support arm located behind the wheel and below the body is fused together. Using a jack, hold the subframe strong on 2005 and after models before disconnecting the subframe support. Take off the brake shoes and wheel cylinder on models with rear drum brakes. Take off the rear brake disc and parking brake assembly if you're working on a car with disc brakes in the back. Take out all brackets from both the Steering Knuckle's arm and the Steering Knuckle bracket, and the fasteners. Remove the stabilizer bar link from the Steering Knuckle. Remove the rear wheel speed sensor, if equipped. Hang up the backing plate carefully while you take out the hub and wheel bearing assembly. Detach the shock absorber from the Steering Knuckle. Take the jack and put it under the Steering Knuckle in back to support it, then remove the suspension links from the Steering Knuckle. Take off the bracket linking the Steering Knuckle's arm part to the body. Carefully pull the whole Steering Knuckle away, and check the bushing for any damage. Take your vehicle to a certified mechanic to have them replace damaged bushings. Look at the state of your CV boots when the Steering Knuckle is off, then replace them if needed. Installation is the reverse of removal, noting the following points: Lift the rear Steering Knuckle with a floor jack to get the correct ride height. Then, tighten all links, supports, and trailing arm fasteners to the recommended torque; tighten brake parts to those torque values; tighten the drive shaft and hub nut to the required torque; tighten wheel nuts to the noted torque; bleed your brakes if you have drum brakes; and readjust the parking brake cable.