Back to all

What Is a Differential and Do You Have One?

July 22, 2022

With front-wheel drive being so common these days in Appleton, Wisconsin, the differential is just taken care of during a transmission service, so most Appleton drivers 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 Appleton customers' minds. It's not uncommon for drivers to not know they have a differential let alone know that it needs service.

Call Tuffy Tire & Auto Service Center Appleton in Appleton at 920-954-8500 for information about differential service, or stop by our Appleton, Wisconsin, auto center at 2940 E. College Ave., 54915.

To better understand what a differential does, think about our local Appleton high school track. 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 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 in the Appleton, Wisconsin area 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 vehicle manufacturers recommend intervals for replacing your differential fluid.

The professionals at Tuffy Tire & Auto Service Center Appleton will drain the used fluid and check it out for metal bits, which could be a sign of excessive wear on the gears. Then they’ll replace the fluid and install the additives if necessary.

Your Tuffy Tire & Auto Service Center Appleton service advisor can look up the vehicle manufacture's recommended service interval or you can check your owner's manual. Give us a call at 920-954-8500 for more information about your differential service.

Tuffy Tire & Auto Service Center Appleton
2940 E. College Ave.
Appleton, Wisconsin 54915
920-954-8500

More articles from Tuffy Appleton

Growing Old Together (Maintaining an Older Vehicle)

March 2, 2025

More and more of us are hanging on to our vehicles longer. A company by the name of HIS Markit recently released a report that shows the average age of light vehicles in the U.S. is now 11.8 years. Light vehicles are cars, SUVs (sport utility vehicles) and CUVs (compact utility vehicles). In C... More

Avoiding Exhaustion (EGR Valve Replacement)

February 23, 2025

No, ERG isnt the sound a pirate makes. Its a part in your vehicle that recirculates exhaust gas to reduce certain gases and pollutants in the atmosphere. In fact, ERG stands for Exhaust Gas Recirculation. One gas our vehicles may make when they burn fuel is nitric oxide, which can play a big ro... More

A Head Start on Starting (Battery Testing)

February 16, 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