5 Common Questions Answered
Want better performance and longer life from your automatic transmission? You’re not alone. While most drivers stay on top of oil changes, tyres, and coolant checks, transmission maintenance is often overlooked — until shifting problems begin.
Your transmission works hard every time you drive, and a little attention goes a long way. Here’s a simple guide answering five of the most common questions to help you maintain your transmission and choose the right parts.
❓ 1. What Is Transmission Fluid?
Automatic Transmission Fluid (ATF) is a specially formulated lubricant that keeps your gearbox running smoothly. It:
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Reduces friction between moving parts
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Cleans and protects internal components from debris
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Cools the transmission by transferring heat away
Healthy transmission fluid ensures smooth gear shifts and helps prevent premature wear or overheating.
❓ 2. Why Does Transmission Fluid Need to Be Changed?
Like engine oil, transmission fluid degrades over time. Heat, friction, and contamination can all cause fluid breakdown — reducing its ability to protect your gearbox.
If fluid is old or low, you might notice:
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Rough or delayed gear changes
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Reduced fuel efficiency
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Gear slipping or hesitation
Left untreated, these issues can lead to expensive transmission repairs or even failure.
💡 Tip: Don’t ignore transmission servicing — it’s one of the best ways to extend the life of your car.
❓ 3. How Often Should You Change Transmission Fluid?
Service intervals vary depending on your vehicle make, model, and driving conditions. Always check your owner’s manual for the manufacturer’s recommendation.
As a general rule:
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Many vehicles require a fluid change around every 60,000 km.
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Check ATF quality and level every time you change your engine oil.
⚠️ Important: Transmission fluid doesn’t “burn off” like engine oil. If levels are low, it usually indicates a leak that needs attention.
❓ 4. How Do You Check Transmission Fluid?
If your car has a transmission dipstick, checking fluid is simple:
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Warm up the engine.
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Locate the dipstick (see your owner’s manual).
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Pull it out, wipe it clean, then reinsert it.
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Remove again to check the level and colour.
What to look for:
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✅ Healthy ATF: Bright red or translucent amber
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⚠️ Bad ATF: Dark brown or black, burnt smell, or gritty feel
If your vehicle doesn’t have a dipstick, a mechanic will need to check the fluid using a diagnostic tool or inspection plug.
❓ 5. Can You Change Transmission Fluid Yourself?
Yes — but it depends on your vehicle and your level of experience.
Some vehicles are easy to service using a transmission service kit (fluid, filter, and gasket). Others, particularly those with sealed transmissions, can be more complicated and require special tools.
🧰 If you’re tackling the job yourself:
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Always use the correct fluid type (consult your manual or ask our team).
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Fill to the correct level — underfilling or overfilling can cause damage.
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Replace the filter and gasket if your transmission uses them.
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Dispose of old fluid responsibly.
When in doubt, it’s best to speak to a qualified mechanic.
🛠️ Need Parts for a Transmission Service?
At Run Auto Parts, we stock everything you need for a complete automatic transmission service, including:
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Transmission fluid (ATF)
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Filters and gaskets
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Seals and washers
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Full service kits for all major makes and models
✅ Genuine OEM-quality parts
✅ Fast delivery across Australia and New Zealand
✅ VIN Fitment Check Service for guaranteed compatibility
Whether you drive a Toyota, Ford, Mazda, Hyundai, Subaru, or a European make, you can shop with confidence knowing every part is a perfect fit.
Shop Transmission Parts Now
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