Gearing Up (Differential Fluid Service)
April 26, 2026
You may have never thought about it, but when you turn a corner, the wheels on one side of your vehicle turn at a different speed than the other side. What is this magic? The answer is something called the differential.
A differential is a gear box placed between the drive wheels and needs lubrication to work. Over time, that fluid can become contaminated, reducing its effectiveness. You likely won’t be able to detect any signs that it’s happening, though it may get a little noisier over time.
If you continue to drive with contaminated and degraded differential fluid, the gears may wear prematurely. That can also contribute to excess wear on the drive-wheel tires.
Two-wheel drive vehicles have one differential while all-wheel and 4-wheel drive vehicles will have two or three. Your vehicle’s manufacturer has guidelines on how often you should have the differential fluid changed, and we recommend you follow those.
Changing the differential fluid is different depending on what model and year of vehicle you own. Some have a drain plug so the fluid can be removed and replaced. In others, a cover and gasket on the differential will have to be removed and replaced.
Because differentials have constantly moving parts, they generate heat. That’s why some have a vent to help dissipate the heat caused by friction, and sometimes that vent will need replacing.
When you bring your vehicle in for differential fluid replacement, our technician will also inspect the differential for other issues and test drive it to make sure it’s operating the way it should.
Sovel's Auto Service
41425 W. 10 Mile Rd.
Novi, Michigan 48375
248-348-7337
Need Service?
More articles from Sovel's Auto Repair Novi
A Honking Big Jam (Stuck Horn)
April 19, 2026
At one time or another, most drivers honk their horn at someone who might be texting at a stoplight or not paying attention when they're driving. But what happens when you tap on your horn and all of a sudden it won't quit? Everyone's looking at you like you're an angry jerk and all you want to ... More
Motor Oil—The Synthetic Advantage (Synthetic oil vs Conventional)
April 15, 2026
Youve probably already heard that regular oil changes are extremely important for the health of your vehicles engine. Thats sound advice. But what you might not know is when it comes to motor oil, the real thing may not be the best thing for your engine. There are different types of motor oil: ... More
What’s That Yellow Squiggly Line Anyway? (What Warning Lights Mean)
April 14, 2026
You may have noticed when you start your vehicle, youll see several symbols light up on the dash. Theyre different colors and shapes, and sometimes its hard to figure out what each of those symbols mean. They are warning lights and symbolize something in your vehicle is sending you a message. I... More