Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to check ball joints [title] Look for a wear indicator. [step] While the vehicle is still on the ground, look underneath the car, on the bottom of the steering knuckle attached to the wheel. The most common indicator is a grease fitting that doubles as a wear indicator.

Ending1: [substeps] Sometimes, grease can be seen through persistent grime; bearings might melt as it is driven in or bumped on in the vehicle. Constantly looking under the car means any solid, solid surface might form in contact with an oil pan. Ending2: [title] Look for a lack of a shine. [step] While driving the vehicle, be wary of any damage to the bearings. Ending3: That fitting, or boss, will stick out of the bottom of the joint's housing by about half an inch (1.25 centimeters). As it wears the boss will recede into the housing. Ending4: Drive your car with the side door " on " facing out. If the tire is completely out of clear, you will not need to drive from the right side.

Answer format: ending1/ending2/ending3/ending4