Moonlight Diesel
1885 North Main St, North Logan, UT 84341 435.563.0643

Simple Answers from Moonlight Diesel for North Logan: Differential Service

Last Updated: Jul 01, 2025

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Question:
What is a differential and why do North Logan drivers need to have it serviced?

Moonlight Diesel Answer:
First of all – your vehicle does have a differential. If it's a rear wheel drive, your differential is on the back. If it's front wheel drive, your differential is built into your transaxle (transmission). North Logan drivers with all wheel drive or four wheel drive will have differentials front and rear and maybe one in between.

When you are steering through a turn at an intersection in North Logan, the wheels on the outside of the vehicle have to spin faster than the inside wheels because they have to travel a slightly longer distant through the curve. The differential compensates for these speed differences between the wheels.

Because it is part of the equipment that transfers engine power to the wheels, the differential is working pretty hard. Differential fluid – a special heavy-duty oil – cools, lubricates and protects the differential. It needs to be replaced on a schedule to remove metal shavings and other contaminants. Note: if you have a front wheel drive vehicle, replacing your transmission fluid takes care of your differential service needs.

Differentials have become increasingly sophisticated for North Logan drivers. Rather than the simple mechanical devices of yesteryear, they are more complicated and may actually be part of the computer controlled vehicle stability system. This means they are more taxed, so it pays for North Logan drivers to have them serviced on schedule at Moonlight Diesel in North Logan to avoid premature wear. Talk to your friendly and knowledgeable pros at Moonlight Diesel.

Give us a call.

Moonlight Diesel
1885 North Main St
North Logan, UT 84341
435.563.0643

At Moonlight Diesel we install quality NAPA replacement parts.