why is my Ford F-150 12th Generation (2009-2014) shaking when I brake

Solution

1. Preparation

• Gather tools: jack, jack stands, lug wrench, dial indicator, torque wrench, and brake cleaner.
• Ensure the vehicle is on a flat surface and the parking brake is engaged.
• Disconnect the negative battery terminal to ensure safety.

2. Remove Wheels

• Loosen the lug nuts slightly while the vehicle is on the ground.
• Raise the vehicle using a jack and support it securely with jack stands.
• Remove the wheels to access the brake components.

3. Inspect and Replace Rotors

• Inspect Rotors: Use a dial indicator to measure rotor runout. If it exceeds specifications (usually 0.002-0.004 inches), the rotor may be warped.
• Replace Rotors: If warped, remove the caliper bolts, lift the caliper off the rotor, and support it without stretching the brake line. Remove the rotor by unscrewing the retaining screws.
• Install New Rotors: Clean the new rotors with brake cleaner to remove any protective coating. Install the new rotor and secure with retaining screws.

4. Inspect and Replace Brake Pads

• Inspect Pads: Check the brake pads for uneven wear or thickness. If worn below manufacturer specifications (typically 3mm), replace them.
• Replace Pads: Remove the caliper using a socket set. Slide the old pads out of the caliper bracket. Install new pads, ensuring they are correctly positioned and aligned.

5. Reassemble Components

• Reinstall the brake caliper, ensuring to torque the caliper bolts to the manufacturer's specifications (usually around 25-35 lb-ft).
• Reattach the wheels and hand-tighten the lug nuts.
• Lower the vehicle and fully tighten the lug nuts in a crisscross pattern to the specified torque (typically 75-100 lb-ft).