Symptoms:
* Whirring or humming noise: This is the most common symptom. The noise will typically increase with speed and might change pitch depending on engine RPM. It often sounds like it's coming from directly under the vehicle.
* Vibrations: You'll feel vibrations in the cab, especially at highway speeds. These vibrations are often more pronounced at certain RPMs.
* Driveshaft play: With the vehicle safely supported on jack stands (never work under a vehicle supported only by a jack), try to grab the driveshaft near the center support bearing and move it up and down or side to side. Excessive play indicates a worn or failing bearing. Caution: Be extremely careful when doing this; the driveshaft is heavy and could cause injury.
* Clunking or knocking noise: While less common than whirring, a clunking or knocking sound, especially when accelerating or decelerating, could signify a failing bearing.
* Leaking grease: Check the area around the center support bearing for grease leaks. This indicates a seal failure which often precedes complete bearing failure.
Diagnosing:
1. Listen carefully for the noise: Try driving at different speeds and listen for the telltale whirring or humming.
2. Check for vibrations: Pay attention to the vibrations felt in the steering wheel, seat, or floorboard.
3. Inspect the driveshaft and bearing: Only attempt this if you're comfortable working under a vehicle and have properly secured it on jack stands. Look for obvious signs of damage, leaks, or excessive play in the driveshaft.
Important Considerations:
* Other potential causes: These symptoms can also be caused by other issues, such as unbalanced tires, worn U-joints, or transmission problems. A proper diagnosis requires a thorough inspection.
* Safety first: Never work under a vehicle supported only by a jack. Use jack stands for safety. If you are not comfortable performing this inspection yourself, take your vehicle to a qualified mechanic.
* Ignoring the problem: Driving with a bad center support bearing can lead to driveshaft failure, potentially causing a loss of control and an accident.
If you suspect a problem with your Ford Ranger's center support bearing, it's best to have it inspected by a mechanic as soon as possible. Ignoring the problem can lead to more extensive and costly repairs.
