1. Incorrect Tire Installation: Improper tire mounting, balancing, or alignment during the tire change could cause vibrations at certain speeds. Ensure the tires are correctly installed and balanced.
2. Mismatched Tires: If the new tires have a different tread pattern or size from the previous ones, it could create an imbalance, leading to shaking. Verify that all four tires are the same size and have similar tread patterns.
3. Bent Wheels: As mentioned, even slightly bent wheels can cause vibrations at higher speeds. Have the wheels inspected and straightened or replaced if necessary.
4. Brake Issues: Although you had your front brakes checked, any underlying issues with the rear brakes or rotors could still cause shaking. Get the rear brakes inspected to rule out potential problems.
5. Driveline Problems: Issues with components such as the driveshaft, CV joints, or differential could cause vibrations at certain speeds. Have the driveline inspected for any abnormalities or excessive play.
6. Wheel Alignment: Incorrect wheel alignment can also lead to shaking at high speeds. Ensure the wheels are properly aligned according to the vehicle manufacturer's specifications.
7. Suspension Issues: Worn or damaged suspension components like shocks, struts, or control arms could cause the rear of the minivan to shake. Inspect the suspension for any signs of wear or damage.
8. Loose Lug Nuts: Make sure the lug nuts on the wheels are properly tightened. Loose lug nuts can cause the wheels to wobble and create shaking.
It is important to have a qualified mechanic or technician diagnose the exact cause of the shaking to ensure proper repairs and prevent further damage.
