my Toyota Highlander shakes at high speeds what's causing this

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Wear safety gloves and goggles.

2. Tire Inspection and Balancing

• Sub-step 1: Remove all four tires using a socket set.
• Sub-step 2: Inspect each tire for signs of uneven wear or damage; replace if necessary.
• Sub-step 3: Use a tire balancer to ensure all tires are balanced correctly.
• Sub-step 4: Reinstall the tires and torque the lug nuts to the manufacturer’s specifications (typically 80-100 ft-lbs).

3. Wheel Alignment

• Sub-step 1: On a wheel alignment machine, check the alignment settings.
• Sub-step 2: Adjust the alignment according to manufacturer's specifications, ensuring the camber, caster, and toe are within acceptable ranges.

4. Suspension Component Inspection

• Sub-step 1: Inspect shock absorbers and struts for leaks or damage; replace if necessary.
• Sub-step 2: Check control arms and bushings for wear; replace any worn components.
• Sub-step 3: Ensure all bolts are properly torqued according to manufacturer specifications.