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7120 McGinnis Ferry Rd Suwanee
GA 30024

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D.C. Auto

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Time for Differential Service at D.C. Auto?

Posted September 11, 2022 8:25 AM

Hello Suwanee - 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 D.C. Auto 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 D.C. Auto. If you frequently drive with heavy loads, tow a trailer or drive in hot GA conditions, you may need to change differential fluid more often. Servicing your differential on schedule at D.C. Auto can save a pricey replacement down the road.

Give us a call.

D.C. Auto
7120 McGinnis Ferry Rd.
Suwanee, GA 30024
(770) 495-0909
http://www.dcautoatlanta.com



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My favorite auto repair store, honest and fair price, always got my car repaired in the same day.

, 09/26/2022

I walked in for a long overdue oil change. They were very pleasant. Clear about how long it would take, and easy to work with as a walk-in.

, 09/26/2022

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I never ever write reviews but these folks were fabulous. I was getting error messages on my dashboard thinking everything was horribly wrong with the car and that it would cost me a fortune. They looked it over, fixed what needed to be fixed and trust me, they were way way cheaper than the Mercedes dealership. I don't live close by them but will definitely go there for all my service needs.

, 09/22/2022

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