how to fix Ford F-150 13th Generation (2015-2020) rear differential noise

Solution

1. Preparation

• Tools Required: Floor jack, jack stands, socket set, torque wrench, differential fluid pump, OBD-II scanner.
• Raise the rear of the vehicle using a floor jack and secure it on jack stands.
• Place wheel chocks in front of the front tires to prevent movement.

2. Drain Differential Fluid

• Sub-steps:
  1. Place a drain pan under the rear differential.
  2. Remove the differential cover bolts using a socket set.
  3. Carefully pry the cover off and allow the fluid to drain completely.

3. Inspect Components

• Sub-steps:
  1. Check the ring and pinion gears for wear or damage.
  2. Inspect the differential bearings for play or roughness.
  3. Examine the carrier and spider gears for any signs of wear or breakage.

4. Replace Damaged Components

• Sub-steps:
  1. If any components are worn, replace them with OEM parts.
  2. Remove old bearings using a bearing puller, if necessary.
  3. Install new bearings and shims according to manufacturer specifications.

5. Reassemble Differential

• Sub-steps:
  1. Clean the differential cover and mating surface thoroughly.
  2. Apply new gasket material or a gasket as required.
  3. Reattach the differential cover and torque the bolts to the manufacturer’s specifications (typically around 30-40 ft-lbs).

6. Refill Differential with Fluid

• Sub-steps:
  1. Use a differential fluid pump to fill the differential with the specified fluid (typically 75W-140 synthetic gear oil).
  2. Fill until the fluid reaches the fill hole.
  3. Reinstall the fill plug and torque to specifications.