Symptoms of a Bad or Failing Pinion Shaft Oil Seal

Schedule Vehicle Drivetrain Inspection
Service Area

$0.00

Upfront, Transparent Price
Average rating from 130,153 customers who received a Vehicle Drivetrain Inspection.

The pinion shaft oil seal is located in the differential. The purpose of the seal is to keep fluid in the differential, so it can stay lubricated and run properly. The pinion shaft oil seal is located behind the pinion flange, which is what attaches to the driveshaft flange. Pinion shaft oil seals only last a certain amount of time as heat, wear, and tear break down the seal and require it to be replaced by a mechanic. There are a few things to watch out for when your pinion shaft oil seal starts to go bad.

1. Leaks around the differential

Due to normal wear and tear, it is not uncommon for pinion shaft oil seals to leak. Once it starts leaking, you will notice the leak around the differential. This can be a small wet spot, or actual drops of oil. Either way, you should contact the professionals at YourMechanic to have your pinion shaft oil seal replaced so the problem does not get worse.

2. Low differential fluid

If there is a small leak in your pinion shaft oil seal, another symptom you will notice is low fluid in your differential. Make sure to keep this fluid full while operating your vehicle, and make an appointment with YourMechanic to check your differential fluid. If the differential runs low on fluid, or completely runs out of fluid, then the differential can become destroyed, causing much bigger problems.

3. Grinding noises

A grinding noise while your vehicle is running is a sign that your differential fluid is low or it has run out of fluid. This is important to note because the cause could be the pinion shaft oil seal. Do not drive your vehicle if it does not have fluid in it as this will cause the differential to fail, and you will no longer be able to operate your vehicle.

Best left to the professionals

Replacing a pinion shaft oil seal is best left to the professionals because of the equipment involved. The mechanics will have to crawl under the vehicle and diagnose any problems with the differential. It is important to have not only the pinion shaft oil seal looked at, but the parts connected to it to ensure they are working properly as well.

If you notice leaking, low differential fluid, or grinding noises while you drive, you may have a leaking pinion oil seal. Book a service online 24/7 to have the seal replaced and to prevent further damage to your vehicle.YourMechanic technicians are available for any questions you may have.


Next Step

Schedule Vehicle Drivetrain Inspection

The most popular service booked by readers of this article is Vehicle Drivetrain Inspection. Yourmechanic’s technicians bring the dealership to you by performing this job at your home or office 7 days a week between 7AM-9PM. We currently cover over 10k cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Vehicle Drivetrain Inspection reviews

Excellent Rating


YourMechanic Vehicle Drivetrain Inspection Service

Average Rating

4.9/5

Number of Reviews

130,153

Rating Summary
121,515
4,808
964
664
2,202
121,515
4,808
964
664
2,202

Jeff

32 years of experience
441 reviews
Jeff
32 years of experience
Kia Sorento - Window Motor / Regulator Assembly Replacement (Driver Side Front) - Citrus Heights, California
Jeff came out even on a rainy day. Jeff had all the tools needed as his disposal and then some. Not only that but the job got finished in less than half the time expected. Awesome job, I definitely recommend Jeff.
Acura TL - Timing Belt - Sacramento, California
Jeff was a very goo and honest mechanic. He had my car fixed and ready to go in a timely manner. He even saved me some money by telling me i didn't need the parts i requested because the dealership told me i needed them

Rocco

21 years of experience
302 reviews
Rocco
21 years of experience
Ford Focus - Oil Change - Rancho Palos Verdes, California
Rocco is awesome. He knows his craft, explains things well, repairs/services our cars superbly, leaves the area cleaner than when he arrives, and most importantly, he cares about my family having safe and reliable cars. No shop can match that.

Reginald

36 years of experience
34 reviews
Reginald
36 years of experience
BMW 228i - Brake Pads Replacement (Front) - Los Angeles, California
Reginald was fantastic, but the shop apparently didn't send him with brake pads . . . ???

Jonathan

21 years of experience
22 reviews
Jonathan
21 years of experience
Honda Civic - Car is not starting - Fayetteville, North Carolina
Very professional. Showed up right on time. Great technician.

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE