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How to Diagnose Front Hub Bearings on a 2000 Ford Windstar

Faulty front hub bearings can cause a number of symptoms, such as grinding, whirring, humming, shaking and excessive vibrations. These symptoms are usually most audible when turning a corner. The excess heat, friction and weight from the vehicle components cause the bearings to degrade slowly over time, causing an increase in play and looseness in the bearing unit. Because the front hub bearing bearings sustain the weight of the engine and transmission, their condition can worsen quickly creating a serious safety concern.

Instructions

1

Raise the front of the vehicle with a jack and lower it down onto two jack stands. Check to make sure that the vehicle is firmly supported. Place two wheel chocks behind the rear wheels and set the parking brake.

2

Rotate the tire in both directions and listen for any grinding or roughness. A faulty bearing will sound rough and feel gritty while youre turning the tire. The tire should spin freely and smoothly; if it rattles or grinds while spinning then the wheel bearing is faulty.

3

Grip the wheel with two hands, one on top of the wheel and one on the bottom. Rock the tire in and out while feeling for looseness. The tire should be firm and fixed in place; you should not be able to wiggle it all. Any slop or looseness from top-to-bottom indicates a bad wheel bearing.

4

Lower the vehicle back to the ground and remove the wheel chocks. Drive to an empty street or highway for testing.

5

Accelerate to 40 MPH and make an abrupt lane change to the left while listening for bearing noise. Accelerate back to 40 MPH and make an abrupt lane change to the right while listening for bearing noise. If the bearing noise increases when turning to the left, then the right side hub bearing is faulty. If the bearing noise increases when turning to the right, then the left side hub bearing is faulty. This is because turning to one side increase the load on the bearing of the opposite side when the weight transfers, exaggerating the bearing symptoms.

Posted by Unknown at 1:30 AM

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Labels: 2000, a, bearings, diagnose, ford, front, how, hub, on, to, windstar