🔧 Corolla - CVT Transmission Fluid Drain & Fill

This job replaces old CVT fluid by draining it and refilling to the correct level. On your Corolla’s CVT, fluid level is set using an overflow/level plug at a specific fluid temperature, so getting the temperature and level check right is the key part.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

Assumption: your Corolla uses the K313 CVT with a temperature-based overflow level check.

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⚠️ Safety & Precautions

• ⚠️ Work on a level surface and support the car with jack stands before going underneath.
• ⚠️ CVT fluid temperature matters; setting the level too hot/too cold can cause slipping or damage.
• ⚠️ Keep the engine running only when instructed, and keep hands/clothes away from moving parts.
• ⚠️ CVT fluid can be hot; wear nitrile gloves and safety glasses.
• 🔋 Battery disconnect is not required for a drain & fill.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Drain pan (at least 10-quart)
• Socket set (8mm-19mm)
• Ratchet (3/8" drive)
• Torque wrench (10-100 ft-lbs)
• Hex key socket set (5mm-10mm)
• Trim clip remover
• Fluid transfer pump (hand pump) (specialty)
• OBD2 scan tool that displays CVT fluid temperature (specialty)
• Shop rags
• Brake cleaner spray

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Toyota CVT transmission fluid (Toyota CVT Fluid FE) - Qty: 4 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 place wheel chocks at the rear wheels.
• Raise the front of the car with a floor jack and support it with jack stands at proper lift points.
• Keep the car level (not nose-high). Level is critical for an accurate CVT fluid level check.
• Connect your OBD2 scan tool and set it to display CVT/ATF fluid temperature (this is the temperature of the transmission fluid).
• Pro tip: Open the fill plug first—always.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower engine cover (splash shield)

• Use a trim clip remover to pop out the plastic clips.
• Use an 10mm socket to remove any 10mm bolts holding the cover.
• Set the cover and fasteners aside so nothing gets lost.

Step 2: Locate the CVT fill plug and loosen it first

• Place your drain pan under the transmission area.
• Use the correct socket or hex key socket (varies by plug style) to break the CVT fill plug loose.
• Do not remove it fully yet—just confirm it will come out. This prevents being stuck with an empty CVT you can’t refill.

Step 3: Drain the old CVT fluid

• Position the drain pan directly under the CVT drain area.
• Remove the CVT drain plug using the correct socket or hex key socket.
• Let the fluid drain until it slows to a drip.
• Clean the drain plug with shop rags and brake cleaner spray.

Step 4: Reinstall the drain plug with a new washer

• Install a new drain plug crush washer on the drain plug.
• Thread the drain plug in by hand first (prevents cross-threading).
• Use a torque wrench to tighten the drain plug: Torque to 49 Nm (36 ft-lbs).

Step 5: Pump new CVT fluid in through the fill hole

• Remove the fill plug completely.
• Insert your fluid transfer pump (hand pump) hose into the fill opening (a hand pump is a tool that pushes fluid from the bottle into the transmission).
• Pump in Toyota CVT Fluid FE until fluid begins to run out of the level/overflow opening (or until it begins to dribble back out of the fill opening, depending on plug layout).
• Install a new fill plug crush washer on the fill plug, but don’t final-torque it yet (you may need to add more fluid after the temperature check).

Step 6: Warm the CVT fluid and set the final level (temperature-based)

• With the car still safely on jack stands, start the engine.
• Hold the brake pedal and slowly move the shifter through P-R-N-D, pausing 2-3 seconds in each position, then return to P.
• Use the OBD2 scan tool to monitor CVT fluid temperature.
• When fluid temp reaches 35°C to 45°C (95°F to 113°F), remove the level/overflow plug (if equipped) using the correct hex key socket.
• If no fluid comes out, add CVT fluid through the fill hole using the fluid transfer pump until it becomes a thin steady stream from the overflow/level opening.
• When it becomes a thin stream, wait until it reduces to a fast drip (this indicates correct level at the correct temperature).
• Reinstall the overflow/level plug and tighten with a torque wrench: Torque to 8 Nm (71 in-lbs).

Step 7: Final-tighten the fill plug and reinstall the splash shield

• Tighten the fill plug with a torque wrench: Torque to 49 Nm (36 ft-lbs).
• Clean any spilled fluid with brake cleaner spray and shop rags.
• Reinstall the lower cover using a 10mm socket and the trim clip remover for clips.

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✅ After Repair

• With the car back on the ground, take a short 10-15 minute test drive and verify smooth takeoff and no slipping.
• Recheck underneath for leaks around the drain, fill, and overflow/level plugs.
• Properly dispose of used CVT fluid at a recycling center or auto parts store that accepts waste fluid.

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💰 DIY vs Shop Cost

Shop Cost: $220-$420 (parts + labor)

DIY Cost: $45-$110 (parts only)

You Save: $175-$310 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 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.