When Should You Change Your Transmission Fluid? Mileage, Cost & Expert Tips

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Your car's transmission is one of its most critical components.

Maintaining it properly, especially by changing the transmission fluid at recommended intervals, can extend its lifespan and keep your drive smooth and reliable.

When Should You Change Transmission Fluid?

For automatic vehicles, it's generally recommended to change the transmission fluid every 40,000 km or every 2 years, whichever comes first. However, some car models may have slightly different intervals depending on the manufacturer’s specifications.

Why is it important?

• Maintains proper lubrication in the transmission system
• Reduces wear and tear on internal components
• Ensures smooth gear shifting
• Prolongs the overall life of your transmission

What About “Lifetime” Transmission Fluids?

Some manufacturers claim to use Lifetime Transmission Fluid that supposedly never needs changing. But in reality, all fluids degrade over time, especially in countries like Thailand with hot weather and heavy traffic, which can speed up fluid breakdown.

Even if your vehicle is under warranty (e.g., 3 years or 100,000 km), regular fluid changes are recommended for long-term ownership to prevent sludge build-up and potential damage.

How Much Does It Cost?

The cost varies depending on your car model and the amount of fluid required. Here's a rough estimate:

• At official service centres: Around 2,000 THB, including labour and fluid for most standard cars
• At independent garages: Often lower, but make sure the mechanic is experienced and trustworthy

Important: Always use transmission fluid that matches your car's specification. This is especially crucial for CVT (Continuously Variable Transmission) systems, which require specific fluid formulas. Using the wrong type can lead to costly damage.

In Summary

Changing your transmission fluid at the right time is a small maintenance step that can save you from major repair bills down the line. It keeps your car performing at its best and gives you peace of mind on the road.

Read More:  How to Check a Used Car’s History in Thailand Before You Buy

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