August 22, 2021
There are a lot of drivers in Elgin who are due for a differential service, but had never heard of a differential before. With front-wheel drive being so common in Illinois these days, the differential is just taken care of during a transmission service, so most Elgin folks don't even have to think about it. And rear-wheel drive differentials don't need to be serviced for years, so it's understandable that it's not something on the top of your mind. It's not uncommon for people in Elgin to not know they have a differential, let alone know that it needs service.
To better understand what a differential does, think about a track at any Illinois high school. There are lanes marked off on the track. For the longer distance races, the starting lines are staggered. The starting lines for the outside lanes are ahead of the starting lines for the inside lanes. That's to compensate for the longer length of the outside lanes. Staggering the starting lines means that each runner has the same distance to run.
The differential compensates for the difference in speeds between the inside vehicle wheel and the outside wheel in a turn, because they have to travel together through slightly different distances.
It's a very important function. When you think of it, all the power to get a vehicle moving goes through the differential. Most cars weigh between 3,000 and 6,000 pounds (1,400 and 2,800 kg) – trucks even more. The power from the engine goes through the transmission and then through the differential to the drive wheels.
That's a lot of work and requires very heavy duty parts. And those parts need protection. The differential fluid lubricates the gears in the differential and keeps them cool. The fluid eventually gets dirty and worn down. Some kinds of differentials require special additives that break down over time. So manufacturers recommend intervals for when to replace your differential fluid.
Your knowledgeable Tuffy Auto Service Center Elgin service technician will drain the used fluid and check it out for metal bits, which could be a sign of excessive wear on the gears. He'll then replace the fluid and install the additives if necessary.
Your Tuffy Auto Service Center Elgin service advisor can look up the vehicle manufacturer's recommended service interval or you can check your owner's manual.
At Tuffy Auto Service Center Elgin, we've been providing quality automotive service for our valued Elgin customers since
Tuffy Auto Service Center Elgin
395 S. Randall Rd
Elgin, Illinois 60123
847-717-4682

December 7, 2025
When it comes to brakes on your vehicle, we all know how important it is to keep them working well because they are vital safety equipment. After all, if you cant slow down and stop, you cant drive safely. While many vehicles use what are called disc brakes, theres another type of brakes that ... More

November 30, 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

November 23, 2025
We all want to breathe clean air and keep our planet green. One of the ways to do that is by requiring all vehicles with internal combustion engines to pass an emissions test. Thats because these vehicles can be big polluters. Everyone wants their car to pass the test so they can continue the... More