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Time for Differential Service at Mac's Tire & Auto Repair?

Posted September 4, 2017 10:00 AM

Hello Center Line - 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 Mac's Tire & Auto Repair 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 Mac's Tire & Auto Repair. If you frequently drive with heavy loads, tow a trailer or drive in hot MI conditions, you may need to change differential fluid more often. Servicing your differential on schedule at Mac's Tire & Auto Repair can save a pricey replacement down the road.

Give us a call.

Mac's Tire & Auto Repair
6717 E 10 Mile Rd
Center Line, MI 48015
(586) 427-0111
http://www.macstireandauto.com



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  • Honesty, What makes this place great is their honesty. I feel very comfortable taking my vehicle to Mac's knowing they aren't going to rip me off for repairs I don't need.
    -Cindy T.

  • Another great experience! I have been bringing my car here for service for some time now. Fortunately, I have a vehicle that has held up very well (209,000 miles and counting), but when something does go wrong, I know exactly where to bring it. Mac's Tire & Auto Repair has always been forthright and honest with me; they WILL NOT try to sell you something you don't need. My most recent visit required new brakes, rotors & calipers on the front end. This isn't a cheap job, no matter where you get it done, but I must say, I don't think my brakes were this good even when the car was new. Money very well spent. Keep up the good work!
    -Gary M.

  • Very friendly service Andrew was very helpful making me an appointment. Tony was very helpful and friendly. Quick service. Thank you macs tire and auto repair staff.
    -John - Warren MI

  • I was completely satisfied with the service work on my vehicle. I have already recommended Mac's to a co-worker, I am that happy!
    -Louise M - Center Line