why does my Volvo XC90 shake when I brake from high speed

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Place wheel chocks behind the rear tires for safety.

2. Remove Wheel

• Using a socket set, loosen the lug nuts slightly (do not remove).
• Lift the vehicle using a hydraulic jack and secure it with jack stands.
• Remove the lug nuts completely and take off the wheel.

3. Inspect and Replace Brake Rotors

• Inspect the Rotors: Use a dial indicator to measure rotor runout. If the runout exceeds manufacturer specifications (usually 0.002 inches), proceed to replace or resurface.
• Remove Old Rotors: Unbolt the brake caliper using a socket set and hang it securely. Remove the rotor by unscrewing the retaining screws (if present) and slide it off the hub.
• Install New Rotors: Clean the new rotor with brake cleaner to remove any protective coating. Install it onto the hub and secure with retaining screws.

4. Inspect and Replace Brake Pads

• Inspect Brake Pads: Check the thickness and surface of the pads. If worn unevenly, they should be replaced.
• Replace Brake Pads: Remove the caliper mounting bolts and slide the caliper off. Remove the old brake pads. Install new pads in the caliper bracket, ensuring they are oriented correctly.

5. Reassemble and Torque

• Reinstall the brake caliper over the new pads and secure it with mounting bolts. Torque the bolts to manufacturer specifications (typically around 25-35 ft-lbs).
• Reinstall the wheel and hand-tighten the lug nuts.

6. Lower Vehicle and Finalize

• Lower the vehicle from the jack stands and remove wheel chocks.
• Tighten the lug nuts in a star pattern to the specified torque (usually 80-100 ft-lbs).
• Perform a final inspection of the brake system for any loose components.