🔧 Transmission Fluid - Drain and Refill

This service replaces the old CVT fluid with fresh fluid in your Corolla’s automatic transmission. A drain-and-refill is the safe DIY method; a full flush is not recommended unless Toyota service information specifically calls for it.

Difficulty Level: Intermediate | Estimated Time: 1-2 hours

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⚠️ Safety & Precautions

• Work on level ground only. A CVT fluid level check must be done with the vehicle level.
• Use jack stands. Never rely on a floor jack alone.
• Transmission fluid can be hot. Let the car cool before draining.
• Do not overfill. Too much CVT fluid can cause shifting problems and leaks.
• No battery disconnect is required for this service.

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🔧 Required Tools

You'll need the following tools for this repair:

• 3/8-inch drive ratchet
• 10mm socket
• 14mm socket
• Drain pan
• Torque wrench
• Fluid transfer pump
• Funnel
• Floor jack (rated 3-ton minimum)
• Jack stands
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• CVT fluid - Qty: 4-5 quarts
• Transmission drain plug gasket - Qty: 1
• Transmission overflow/check plug gasket - Qty: 1

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📋 Before You Begin

• Park on a level surface and set the parking brake.
• Chock the rear wheels.
• Raise the front of the car and support it securely on jack stands.
• Have all new fluid ready before you start.
• Warm fluid drains faster.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the vehicle

• Use the floor jack to lift the front of the car at the proper lift points.
• Place the car on jack stands and confirm it is stable before going underneath.
• Keep the car level side-to-side as much as possible.

Step 2: Remove the fill/check plug first

• Use the 14mm socket and ratchet to loosen the transmission fill/check plug before draining.
• This confirms you can refill it later. If it is stuck, do not drain the fluid yet.
• Always open the fill side first.

Step 3: Drain the old fluid

• Place the drain pan under the transmission.
• Use the 14mm socket to remove the drain plug.
• Let the fluid drain completely.
• Install a new transmission drain plug gasket.
• Reinstall the drain plug and Torque to 49 Nm (36 ft-lbs).

Step 4: Refill with fresh CVT fluid

• Use the fluid transfer pump to add new CVT fluid through the fill opening.
• Add fluid slowly until it begins to seep from the level check opening.
• Install a new transmission overflow/check plug gasket.
• Reinstall the check plug and Torque to 39 Nm (29 ft-lbs).

Step 5: Final level check

• Start the engine and let it idle.
• With your foot on the brake, move the shifter through each gear position briefly, then return to Park.
• Recheck for leaks underneath.
• If the fluid level is not correct, adjust only per Toyota’s fill/check procedure.

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✅ After Repair

• Test drive the car gently.
• Check for leaks again after the drive.
• Watch for smooth acceleration and normal shift behavior.
• If warning lights appear, scan for transmission codes.

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💰 DIY vs Shop Cost

Shop Cost: $180-$320 (parts + labor)

DIY Cost: $60-$120 (parts only)

You Save: $120-$200 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.