how to know if my Ford F-150 13th Generation (2015-2020) differential is failing?

Solution

1. Preparation

• Gather tools: jack and jack stands, socket set, differential fluid, drain pan, torque wrench.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Safety Warning: Disconnect the battery before working on electrical systems.

2. Drain Differential Fluid

• Position a drain pan underneath the differential.
• Remove the drain plug using a socket wrench and allow the fluid to completely drain.
• Inspect the fluid for metal shavings or a burnt smell, indicating possible internal damage.

3. Replace Differential Fluid

• After draining, replace the drain plug and torque it to the manufacturer’s specifications.
• Remove the fill plug and use a funnel to add new differential fluid according to the manufacturer's recommendations.
• Replace the fill plug and torque to specification.

4. Inspect and Replace Components (if necessary)

• If noise persists, inspect the differential gears and bearings for wear.
• If damaged, disassemble the differential housing, replace worn components, and reassemble, ensuring all parts are secured to the specified torque values.
• Recheck for proper fluid levels after reassembly.