Maintenance
DIY Transmission Fluid Change (Step-by-Step)
How to change your transmission fluid at home with a drain-and-fill — the tools, steps, and safety tips, plus when a sealed transmission needs a shop instead.
Quick answer
To change transmission fluid yourself, warm the car, raise it safely and level, drain the pan (via the drain plug or by dropping the pan), replace the filter and gasket if serviceable, then refill with the exact fluid your manual specifies and set the level on the HOT range. Sealed transmissions need a scan tool to set the level by temperature, so those are often best left to a shop.
Updated July 1, 2026 · 6 min read
If your car has a drain plug and a dipstick, a fluid change is a satisfying weekend job. Here's how to do it right.
What you'll need
- The exact fluid your manual specifies, and enough of it
- A drain pan, ramps or a lift, wheel chocks
- Basic hand tools; often a new filter and pan gasket
- For sealed units: a scan tool and a fluid pump
Recommended maintenance tools
What most home drain-and-fills call for — always match the fluid to your manual.
- Low-Profile Oil Drain PanCatches the old fluid on a drain-and-fill without making a mess.View on Amazon→
- Transmission Fluid Funnel KitLong flexible spouts reach the fill tube so you top off without spilling.View on Amazon→
- Fluid Transfer Hand PumpPumps fresh fluid up into a sealed or hard-to-reach fill plug cleanly.View on Amazon→
- Nitrile Mechanic GlovesWarm ATF is hot and stains — disposable nitrile keeps hands clean and safe.View on Amazon→
- Dexron VI Full-Synthetic ATFThe common GM-spec fluid many automatics call for — always match your manual first.View on Amazon→
As an Amazon Associate we earn from qualifying purchases. Prices and availability are set by Amazon. Always confirm the exact fluid and procedure in your owner's manual before buying.
Step-by-step (drain-and-fill)
- Warm the transmission, then raise the car level and chock the wheels.
- Position the catch pan and drain — via the drain plug, or by dropping the transmission pan.
- If the pan is off, replace the filter and gasket, and wipe the pan and magnet clean.
- Reinstall and refill with the correct fluid through the fill point.
- Start the engine, cycle through the gears, and set the level on the HOT range.
Safety first
Never work under a car on a jack alone — use stands or a lift. Warm fluid is hot; wear gloves. Keep the level accurate to avoid overfilling.
When to leave it to a shop
Sealed transmissions set the level by fluid temperature with a scan tool, and getting it wrong sets the level wrong. If you don't have the equipment, this is a quick, worthwhile shop job — see the sealed-transmission procedure.
Frequently asked questions
Is changing transmission fluid easy to do yourself?+
On a vehicle with a drain plug and dipstick, a drain-and-fill is one of the more DIY-friendly jobs — mostly draining, replacing the filter/gasket, and refilling. Sealed transmissions are harder because the level is set by fluid temperature with a scan tool.
What do I need to change transmission fluid?+
The correct fluid and quantity, a drain pan, ramps or a lift, basic hand tools, and often a new filter and pan gasket. For sealed units you also need a scan tool to read fluid temperature and a fluid pump.
Can I reuse the transmission pan gasket?+
If you drop the pan, it's best to fit a new gasket (and filter). Reusing an old gasket risks leaks. Many drain-and-fills via a drain plug don't require dropping the pan at all.
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