what causes my Ford F-150 Fourteenth Generation (2021-present) to shudder at highway speeds

Solution

1. Tire Inspection and Adjustment

• Sub-steps:
  1. Remove all four tires using a lug wrench.
  2. Inspect each tire for damage, uneven wear, or bulges.
  3. Measure tire pressure and inflate to the manufacturer's specifications (usually found on the driver’s door jamb).
  4. If tires are worn unevenly or damaged, replace them.

2. Wheel Alignment

• Sub-steps:
  1. Use an alignment machine to check the alignment specifications.
  2. Adjust the camber, caster, and toe settings as needed to match manufacturer specifications.
  3. Test drive the vehicle to ensure the shudder has been resolved.

3. Driveshaft and U-Joint Inspection

• Sub-steps:
  1. Raise the vehicle securely on jack stands.
  2. Inspect the driveshaft for any signs of damage or imbalance.
  3. Check U-joints for play or wear; replace them if necessary.
  4. Reinstall the driveshaft, ensuring all bolts are torqued to manufacturer specifications (refer to service manual for specific torque values).