How long does the output differential seal last?

The differential is located either at the front or at the back of your car, depending on what make and model you drive, and whether it's front or rear wheel drive. When you turn the car, the wheels should turn at the speed of...

The differential is located either at the front or at the back of your car, depending on what make and model you drive, and whether it's front or rear wheel drive. When you turn your car, the wheels need to turn at different speeds, which is what the differential does to keep your car stable. The output differential seal is the part of the differential that connects the driveshaft to the transmission or rear differential. The outlet seal prevents oil or fluid from leaking out of the differential and therefore keeps the part lubricated.

The oil in your differential should be changed every 30,000-50,000 miles, unless the owner's manual says otherwise. Over time, the differential output shaft seal may leak, causing fluid to leak. When this happens, the differential is not lubricated, so the bearings and gears can overheat. If these parts start to overheat, it can cause serious damage to the differential, which can put the car out of action until the differential is repaired.

The output shaft seal leaks more when you drive on the highway, so oil drops in your vehicle may not always indicate that the output differential seal needs to be replaced. If fluid is leaking, you will notice the transmission starting to slip, so this may be a better indicator than looking for oil drops on the road. Preventive maintenance is a good way to ensure that the differential output seals are in good condition. While a professional mechanic is changing the oil, he will inspect and, if necessary, replace the differential output seal. In addition, they will check for oil splashes around the seal, indicating that it needs to be replaced.

Because the output differential seal can fail and leak over time, it's important to know all the symptoms that indicate a part needs to be inspected by a professional.

Signs that indicate the need to replace the differential output shaft seal include:

• Transmission slips when driving at higher speeds
• The transmission fluid or differential oil level is constantly low, indicating a leak
• Grinding sounds when turning

If you are experiencing any of the above issues with your vehicle, be sure to contact a professional mechanic to diagnose your problem and make repairs if necessary.