what's wrong if my Ford F-150 12th Generation (2009-2014) makes a humming sound while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the battery to ensure safety while working on electrical components.

2. Tire Inspection

• Tools Required: Tire pressure gauge, tread depth gauge
  • Check tire pressure with the gauge and inflate to the manufacturer's specifications.
  • Use a tread depth gauge to measure wear; replace tires if tread depth is below 2/32".

3. Wheel Bearing Inspection

• Tools Required: Jack, jack stands, wrench set
  • Lift the vehicle using a jack and secure it with jack stands.
  • Grab the wheel at the 12 and 6 o'clock positions and rock it back and forth. If there’s excessive play, the bearing may need replacement.

4. Differential Fluid Check

• Tools Required: Socket set, fluid pump, differential fluid
  • Locate the differential fill plug, remove it, and check fluid level. Fluid should be at the bottom of the fill hole.
  • If low, pump new differential fluid until it begins to overflow from the fill hole. Replace the plug and torque to manufacturer specifications.

5. Drive Shaft and U-Joint Inspection

• Tools Required: Wrench set, grease gun
  • Inspect the drive shafts for any visible signs of damage or wear.
  • Check the u-joints by attempting to move them by hand. If there is play, replace the u-joint.

6. Reassembly and Testing

• Reassemble any components that were removed during inspection.
• Reconnect the battery and perform a test drive to verify that the humming sound has been resolved.