🔧 Transmission Fluid - Fluid Change

Assumption: This is for the manual transmission in your Yaris. The procedure below covers a drain-and-refill service on the transaxle, not an automatic transmission.

This service replaces old gear oil with fresh fluid to help the transmission shift smoothly and reduce wear. On a manual Yaris, the job is straightforward if you can safely lift the vehicle and reach the fill and drain plugs.

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

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⚠️ Safety & Precautions

• Work on a level surface so the fluid level can be set correctly.
• Let the exhaust and transmission cool before starting.
• Support the vehicle with jack stands; never rely on a jack alone.
• Use the correct fluid only. Wrong gear oil can cause shifting problems.
• Keep the fill plug loose before draining, so you do not trap an empty transmission.
• Wear gloves and safety glasses.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (pair)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• 3/8-inch drive ratchet
• Drain pan
• Fluid transfer pump
• Torque wrench
• Shop towels
• Brake cleaner
• 24mm socket

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Manual transmission gear oil - Qty: 2 quarts
• Drain plug crush washer - Qty: 1
• Fill plug crush washer - Qty: 1

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📋 Before You Begin

• Park on level ground.
• Set the parking brake and chock the rear wheels.
• Raise the front of the vehicle and support it evenly on jack stands.
• Have the new fluid ready before loosening the plugs.
• Warm fluid drains faster, so a short drive helps if the transmission is cold.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and secure the vehicle

• Use the floor jack to lift the front of the Yaris at the proper lift points.
• Place jack stands under the front support points and lower the vehicle onto them.
• Use wheel chocks at the rear wheels.

Step 2: Locate the fill and drain plugs

• Find the transmission case under the vehicle.
• The fill plug is on the side of the transmission case.
• The drain plug is on the lower part of the case.
• Always remove the fill plug first.

Step 3: Remove the fill plug

• Use the 24mm socket and 3/8-inch drive ratchet to loosen and remove the fill plug.
• Check that it moves freely before draining.

Step 4: Drain the old fluid

• Place the drain pan under the drain plug.
• Use the 24mm socket and 3/8-inch drive ratchet to remove the drain plug.
• Let the fluid drain completely.
• Clean the drain plug with brake cleaner and a shop towel.
• Install a new drain plug crush washer.
• Reinstall the drain plug by hand first, then torque to 49 Nm (36 ft-lbs).

Step 5: Refill the transmission

• Use the fluid transfer pump to pump fresh manual transmission gear oil into the fill hole.
• Fill until fluid just begins to seep back out of the fill opening.
• Install a new fill plug crush washer.
• Reinstall the fill plug and torque to 49 Nm (36 ft-lbs).

Step 6: Clean up and lower the vehicle

• Wipe the case clean with shop towels.
• Check both plugs for leaks.
• Lower the vehicle carefully with the floor jack.

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✅ After Repair

• Start the engine and test the clutch and shifter action.
• Drive slowly and check for smooth shifting.
• Recheck for leaks after a short test drive.
• If shifting feels notchy, verify the correct fluid type and fill level.

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💰 DIY vs Shop Cost

Shop Cost: $180-$300 (parts + labor)

DIY Cost: $35-$70 (parts only)

You Save: $145-$230 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?

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