my Ford Explorer makes a whining noise when I accelerate what's wrong

Solution

1. Preparation

• Tools Required: OBD-II scanner, mechanic's stethoscope, socket set, fluid pump, torque wrench, jack and jack stands.
• Safety Warnings: Disconnect the battery before working on electrical systems. Allow the engine to cool before starting.

2. Repairing or Replacing the Serpentine Belt

1. Remove the Serpentine Belt:
   • Use a socket wrench to relieve tension from the tensioner pulley.
   • Slide the belt off the pulleys.
2. Inspect for Damage:
   • Check the belt for any signs of wear, fraying, or glazing.
3. Replace if Necessary:
   • Install a new serpentine belt by routing it according to the belt routing diagram.
   • Ensure it is properly seated on all pulleys.

3. Checking and Replacing Transmission Fluid

1. Check Fluid Level:
   • With the engine running, remove the transmission dipstick and wipe it clean.
   • Reinsert and remove it again to check the fluid level.
2. Change Fluid if Low or Contaminated:
   • If the fluid is low, add the recommended transmission fluid.
   • If it appears burnt or dirty, perform a fluid change:
     • Drain the old fluid using a fluid pump.
     • Replace with new transmission fluid according to manufacturer specifications.

4. Inspecting and Replacing Wheel Bearings

1. Lift the Vehicle:
   • Use a jack to lift the vehicle and secure it with jack stands.
2. Remove Wheel:
   • Take off the wheel to access the hub assembly.
3. Inspect Bearings:
   • Check for any roughness or play in the wheel bearings.
   • If necessary, remove the hub assembly and replace bearings.
4. Reassemble:
   • Reinstall the hub assembly and wheel, ensuring all components are torqued to specifications.