Back to all

Differential Service at Courtesy Auto Repair Plus

February 11, 2020

Here at AutoNetTV, we have national viewers, like your neighbors in Tiffin, who write to us with questions or feedback. One common question we're asked is: "What is a differential and what does it do?" You may have been told by your Courtesy Auto Repair Plus service advisor that your differential needs serviced, or it's seen it as an option up on the service menu. Differential service at Courtesy Auto Repair Plus covers a lot of things, so let's first talk about what a differential does.

As you drive through a turn, your outside wheels and inside wheels turn at different speeds. Kind of like the cars going around a race track - the ones driving in the outside lanes have a greater distance to travel than the cars in the inside lanes. The differential is what allows the outside and inside drive wheels to rotate at slightly different speeds so that the tires don't hop or skip while taking corners, or lose traction in dirt or snow on Tiffin area roads. Differentials have gears in them that transfer the power from the drive train to your wheels - which is why they're often referred to as gear boxes. The gears need to be very strong to do this work, and they need to be properly protected so that they'll last.

All vehicles in Tiffin have some form of differential. If you have a front-wheel drive car, your differential is sometimes called a transaxle and is located in the front. If you have rear-wheel drive, the differential is in the back of the car. Tiffin auto owners with a four-wheel drive vehicle have a differential in the front and the back - and in the middle as well. The center differential adjusts for differences in speed between the front and rear wheels.

Differential fluid lubricates and cools the gears. Over time, the fluid can get dirty from bits of the gears grinding off. The additives that keep the fluid clean and protect the differential break down over time. So your vehicle manufacturer has scheduled intervals for you to have your differential fluid changed. Talk to your friendly and knowledgeable Courtesy Auto Repair Plus service advisor if you are not sure about your recommended schedule.

Courtesy Auto Repair Plus
967 Bon Air Ave
Tiffin, Ohio 44883
419-443-0797
http://www.courtesyautorepairplus.com

More articles from Courtesy Auto Repair Plus

Start Me Up

September 6, 2026

You have a nice road trip planned out. Youre all packed, sit down in the drivers seat, go to start your vehicle up and Nothing! You might hear a click, but thats it. What do you do now? Your problem may be a bad ignition switch. There are other symptoms you may notice. A failing ignition swi... More

Ball Joint Replacement

August 30, 2026

Think about this the next time youre driving. Your front wheels can steer your vehicle and, at the same time, the wheels can move, even with all the irregularities in the road moving them up, down and in different directions. Pretty amazing engineering, wouldnt you say? What allows that are part... More

In That Case… (Transfer Case Exchange)

August 23, 2026

Ever wonder how all-wheel-drive or 4-wheel-drive vehicles get the power from the engine to the front and rear wheels? The magic happens in what's called a transfer case. In some all-wheel-drive vehicles, it's sometime called a power take-off unit, or PTU. Inside the transfer case is a set of ge... More