What Is a Differential (and Does It Need Servicing)?
The differential is a part most owners never think about — until it whines. A Cranbourne West specialist explains.
What it is & what it does
The differential lets your driven wheels turn at different speeds when you go around a corner (the outer wheel travels further than the inner). Rear-wheel-drive, AWD and 4WD vehicles have one or more diffs; front-wheel-drive cars have it built into the transaxle.
It’s filled with oil that lubricates the gears under heavy load.
Signs of trouble & how we help
Diff oil degrades over time and is a commonly-forgotten service — especially on AWD/4WD and towing vehicles. A whine that changes with speed, or a clunk, can signal diff wear. Neglected diff oil leads to expensive failures.
We change diff (and transfer-case) oil on schedule and diagnose diff noises — cheap maintenance that prevents big bills.
Questions about your car? Just ask.
Understanding what’s under the bonnet makes servicing decisions easier — and we’re always happy to explain what your car needs and why, in plain English.
Book a service or a check with a Cranbourne West specialist online in 60 seconds, or call 03 8782 0711.
What Is a Differential (and Does It Need Servicing)? — FAQ
It lets the driven wheels turn at different speeds when cornering — essential for smooth, safe driving.
Yes — the diff oil degrades and is commonly forgotten, especially on AWD/4WD and towing vehicles.
A whine that changes with speed, or a clunk — get it checked.
Yes — diff and transfer-case oil changes and noise diagnosis.
Related guides & services
Need yours checked?
Trusted Cranbourne West car specialists — RACV-accredited, fixed written pricing. Book online or call 03 8782 0711.