🔧 Transaxle Fluid - Drain and Fill

Your RAV4 Hybrid uses an electronically controlled transaxle, not a conventional belt CVT. This service replaces the fluid in the hybrid transaxle case and helps protect the electric motor/generator set and gear set from wear. The job is straightforward, but fill level accuracy matters, so go slow and work clean.

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

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⚠️ Safety & Precautions

• Hybrid high-voltage components are present. Do not touch orange cables or open HV components.
• Park on level ground and keep the vehicle securely supported with jack stands.
• Let the transaxle cool before draining; hot fluid can burn you.
• Use only the specified Toyota automatic transmission fluid type for this transaxle.
• Battery disconnect is not required for a basic drain-and-fill, but keep the ignition off the entire time.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 14mm socket
• Torque wrench
• Ratchet
• Drain pan
• Fluid hand pump
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Funnel with hose
• Safety glasses
• Nitrile gloves
• Shop rags

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Toyota ATF WS fluid - Qty: 4 quarts
• Transaxle drain plug gasket - Qty: 1
• Transaxle fill plug gasket - Qty: 1

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📋 Before You Begin

• Park on a level surface and set the parking brake.
• Make sure the vehicle is in P and fully powered off.
• Raise and support the vehicle evenly so it stays level.
• Level is critical for the final fluid check.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the under cover

• Use a 10mm socket to remove the underbody cover fasteners.
• Set the cover and fasteners aside in order.

Step 2: Loosen the fill plug first

• Use a 14mm socket to loosen the transaxle fill plug.
• Do this before draining so you know you can refill it later.
• Never drain it before checking the fill plug.

Step 3: Drain the old fluid

• Place a drain pan under the transaxle drain plug.
• Use a 14mm socket to remove the drain plug and let the fluid drain fully.
• Clean the drain plug magnet if equipped.
• Install a new drain plug gasket.
• Torque to 39 Nm (29 ft-lbs).

Step 4: Reinstall the drain plug

• Reinstall the drain plug by hand first to avoid cross-threading.
• Use a torque wrench with a 14mm socket to tighten it.
• Torque to 39 Nm (29 ft-lbs).

Step 5: Fill with new fluid

• Use a fluid hand pump and hose to add Toyota ATF WS fluid through the fill hole.
• Keep adding fluid until it just begins to run back out of the fill opening.
• Install a new fill plug gasket.
• Reinstall the fill plug and tighten with a torque wrench and 14mm socket.
• Torque to 39 Nm (29 ft-lbs).

Step 6: Reinstall the under cover

• Put the underbody cover back in place.
• Use a 10mm socket to reinstall all fasteners.
• Snug them evenly; do not overtighten plastic clips.

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✅ After Repair

• Start the vehicle and let it idle briefly.
• Check under the transaxle for leaks.
• Take a short test drive and recheck for seepage.
• Dispose of used fluid properly at a recycling center.

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💰 DIY vs Shop Cost

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

DIY Cost: $60-$110 (parts only)

You Save: $120-$210 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.