Time for Differential Service at Sovel's Auto Service?
March 24, 2019
Hello Novi - let's talk differentials. If you have a rear-wheel drive vehicle, your differential is on the back axle. With front-wheel drive cars, the differential is up front. All-wheel drive and 4-wheel drive vehicles have three differentials - front, rear and in the middle. So you see, you've got a differential (or two or three) and it needs service now and then.
What does your vehicle differential do? Well, it compensates for the differences in speed between your outer and inner wheels in a turn. Using the dimensions of a typical car, let's compare the distance the wheels travel from the start of a turn through to the completion of the turn.
The inside wheel travels about 12.6 feet/3.8 meters. How much farther does the outside wheel travel? About 18.8 feet/5.7 meters – over 6 feet/1.9 meters more. This means the outer tire has to rotate 9 times in the same amount of time that the inner tire has to rotate only 6 times - so the outer tire has to spin faster in order to keep up. The differential makes this possible.
The gears in the differential are cooled and lubricated by differential fluid. It's this fluid that needs to be serviced. Small bits of the gears break off and are suspended in the differential fluid. The dirtier the fluid, the faster the gears wear.
So your Sovel's Auto Service technician drains the old fluid out and replaces it with fresh fluid. Some differentials also need a special additive that is put in at this time.
So when should you have your vehicle differential serviced? Intervals vary from vehicle to vehicle – and may be as short as 15,000 miles/24,000 km – so check your vehicle owner's manual or ask us at Sovel's Auto Service. If you frequently drive with heavy loads, tow a trailer or drive in hot Michigan conditions, you may need to change differential fluid more often. Servicing your differential on schedule at Sovel's Auto Service can save a pricey replacement down the road.
Give us a call.
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
Don?t Skip Out on These! (Vehicle Maintenance Items You Should Never Postpone)
November 2, 2025
Maybe that little sticker on your windshield is giving you the reminder that its time for your vehicle to have an oil change. Youve thought, Aw, I can skip this one and save myself a little money. When it comes to things you should never ignore on your vehicle, timely oil changes are number one... More
Staying In Charge (Alternator Repair)
October 27, 2025
Seems like these days, we're hearing about more and more electric or hybrid vehicles. Keep in mind that conventional gasoline internal combustion vehicles have important electrical components, too, and it's important to make sure they're operating at their peak. In a vehicle with a gasoline engi... More
A Head Start on Starting (Battery Testing)
October 23, 2025
If your vehicle isn't starting or doesn't sound like it used to when you crank it, the culprit may be the battery. You may have left a light on, or something plugged into one of charging ports. Maybe you accidentally left your vehicle in the "on" or "accessory" position when you last got out. M... More