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What Is Differential Fluid Service?

Your differential is the gear assembly that transfers power from your transmission to your wheels, allowing them to spin at different speeds when turning. Differential fluid lubricates these gears and keeps them cool. Over time, the fluid breaks down and metal particles accumulate, reducing its effectiveness. A differential fluid service drains the old fluid and replaces it with fresh, clean lubricant.

Why It Matters

Differential gears operate under extreme pressure and heat. When the fluid breaks down, metal-on-metal contact increases and the gears wear faster. This is especially important for AWD and 4WD vehicles common in the Fraser Valley, where all differentials need regular attention. Neglecting differential fluid can lead to noisy differentials, poor handling, and eventually expensive gear replacement.

Signs You Need Differential Fluid Service

  • Whining or howling noise from the rear or front axle
  • Clunking sound when changing direction
  • Fluid looks dark or smells burnt when checked
  • It's been more than 50,000 km since your last differential service
  • You tow, haul, or drive in demanding conditions regularly

What We Do

We drain the old differential fluid, inspect the drain plug for metal particles (a sign of internal wear), clean the housing, and refill with the correct fluid specification for your vehicle. If your vehicle has front and rear differentials (AWD/4WD), we can service both. We also check for leaks and inspect the differential cover gasket.

Frequently Asked Questions

Most manufacturers recommend every 50,000 to 80,000 km. If you tow, drive in mountainous terrain, or have an AWD/4WD vehicle, consider doing it every 40,000 to 50,000 km.

Yes -- every vehicle has at least one differential. Front-wheel drive vehicles have one integrated with the transmission (transaxle). Rear-wheel drive vehicles have a separate rear differential. AWD and 4WD vehicles typically have two or three.

The fluid loses its lubricating properties and metal shavings accumulate. Eventually, you'll hear whining or grinding, and the differential gears can fail -- an expensive repair that could cost $1,000 or more.

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