* Wheel bearings: This is the most common culprit. A worn or damaged wheel bearing will create a growling sound that often increases with speed. The noise might also change depending on turns.
* CV (Constant Velocity) axles: These transmit power from the transmission to the wheels. A worn or damaged CV axle boot (allowing grease to leak) or a failing joint within the axle itself can produce a growling or clicking sound.
* Differential: Problems within the differential, such as worn gears or low gear oil, can generate a growling or whining sound, particularly under load or when turning.
* Hub assembly: Similar to wheel bearings, a failing hub assembly can make a growling noise.
* Brake components: While less likely to cause a *growling* specifically, severely worn brake pads or a dragging caliper could create a noise that might be misinterpreted as a growl.
To diagnose the problem:
You'll need to have a mechanic inspect the vehicle, but you can try some preliminary checks:
* Check for play in the wheels: Jack up the front of the Tahoe, support it securely, and try to wiggle each wheel. Excessive play indicates a potential bearing or hub problem.
* Listen carefully to the sound: Does the noise change with speed, turning, or braking? This can help pinpoint the source.
* Check the CV axle boots: Look for any tears or damage to the rubber boots surrounding the CV axles.
It's crucial to get this checked out promptly. Driving with a damaged axle component can lead to further damage, potentially resulting in a loss of control or a breakdown. Ignoring the problem could lead to a more expensive repair later.
