What is a differential gasket?
The differential gasket seals the differential housing to keep the gear oil inside the housing to allow for proper lubrication of the differential ring and pinion gears. If the gasket fails, it can result in the differential leaking, which may increase the risk of running low on fluid and suffering serious damage.
If the seal leaks or the fluid is low, your car will emit grinding or whining noises from the front. This could indicate differential failure. You might also see puddles of fluid under the motor compartment.
If your differential gasket is leaking, a mechanic will inspect the differential and the gasket for leaks and damage and completely replace the faulty differential gasket if needed.
How do I know if my differential gasket needs replacing?
When your car displays warning signs of a bad rear differential gasket, it’s time to be serviced. These include:
Grinding or whining noise from the front, which can indicate a leaky seal or low fluid
Puddles of fluid under the motor compartment
In most cases, the differential gasket can be taken apart and replaced without much trouble—but it depends on the extent of any damage.
Your mechanic should replace the differential the same day to ensure the internal gears aren’t exposed. This can dry out the seals inside the housing.
How often should you replace the differential gasket?
The rear differential is responsible for controlling the back wheels to allow them to rotate at different speeds, allowing your vehicle to travel smoothly and maintain traction on the road. If you have a rear-wheel drive vehicle, you have a rear differential. Front-wheel drive vehicles have a differential at the front, while rear-wheel drive vehicles have a differential at the back. The differential gasket seals the differential housing and keeps the differential oil inside.
Because the rear-end differential is one of the most heavily stressed components on any car, it takes quite a beating and is prone to the same wear and tear that many other mechanical components are subject to. While any part of the different can become damaged, it’s usually the gasket. A failing gasket can happen at any time, so it’s recommended to have them replaced when you have a fluid change, about every 30,000 to 50,000 miles, unless your vehicle’s owner’s manual states otherwise.
Can I replace the differential gasket myself?
For drivers who want to save money on car expenses
and are keen to take on a DIY auto project, replacing the differential gasket might be possible if you have the right tools and equipment. But because the car needs to be jacked up and the differential welded on, if you don’t have the knowledge or tools to do so, it’s a good idea to let a professional handle the differential gasket replacement to avoid further damage or injury.