🔧 Outback - CVT Fluid Drain & Refill (Transmission Fluid Change)

This job is a drain-and-refill on your Outback’s CVT, then a very specific fluid level check at the correct temperature. CVTs are sensitive to fluid level, so the “set level at temperature” step is the most important part.

Difficulty Level: Advanced | Estimated Time: 2.0-3.5 hours

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⚠️ Safety & Precautions

• ⚠️ Support the car on jack stands before going underneath.
• ⚠️ CVT fluid can be hot; wear gloves and safety glasses.
• ⚠️ Level-check is done with the engine running—keep hands/clothes away from belts/fans.
• ⚠️ Keep the car level (front-to-rear and side-to-side) or the fluid level will be wrong.
• ⚠️ Do not substitute “universal ATF/CVT fluid”—use the correct Subaru CVT fluid.

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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, set of 4)
• Wheel chocks (2-pack)
• Safety glasses
• Nitrile gloves
• Drain pan (10-quart minimum)
• Socket set (metric)
• 3/8" drive ratchet
• 1/2" drive torque wrench (20-100 ft-lbs range)
• 3/8" drive torque wrench (5-30 ft-lbs range)
• Trim clip tool
• Funnel with hose
• Fluid transfer pump (specialty)
• OBD2 scan tool or phone OBD2 adapter that reads 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:

• Subaru High Torque CVT Fluid - Qty: 7 quarts
• CVT drain plug crush washer - Qty: 1
• CVT level check plug crush washer - Qty: 1
• CVT fill plug crush washer - Qty: 1

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📋 Before You Begin

• Park on a flat, level surface and chock the rear wheels with wheel chocks.
• Lift and support the car level on 4 jack stands using a floor jack.
• Set up your OBD2 scan tool to view “CVT fluid temperature.” This is required to set the fluid level correctly.
• Tip: A “fluid transfer pump” pushes fluid into the fill port.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower under cover (if equipped)

• Use a trim clip tool and metric socket set with a 3/8" drive ratchet to remove the fasteners and take off the under cover.
• Set hardware aside in a tray so nothing gets lost.

Step 2: Identify the CVT plugs

• Locate the CVT drain plug at the bottom of the transmission case.
• Locate the CVT fill plug on the transmission (used to add fluid).
• Locate the CVT level check plug (used to set final fluid level at temperature).
• Tip: Clean around plugs before opening.

Step 3: Drain the old CVT fluid

• Place a drain pan (10-quart minimum) under the drain plug.
• Use the correct-size socket with a 3/8" drive ratchet to remove the drain plug.
• Let the fluid drain completely (usually 10–20 minutes).
• Clean the drain plug and sealing surface using shop rags and brake cleaner spray.

Step 4: Reinstall drain plug with new washer

• Install a new CVT drain plug crush washer on the drain plug.
• Thread the drain plug in by hand first.
• Tighten using a 1/2" drive torque wrench: Torque to 50 Nm (37 ft-lbs).

Step 5: Add initial fill amount of CVT fluid

• Remove the CVT fill plug using the correct-size socket and a 3/8" drive ratchet.
• Install your fluid transfer pump (specialty) and pump in fresh Subaru High Torque CVT Fluid.
• Add approximately the amount you drained (measure what came out in your drain pan if it has marks).
• Reinstall the fill plug loosely for now (you may need to add more later).

Step 6: Warm up CVT fluid and circulate it

• Start the engine and keep your foot on the brake.
• Use your OBD2 scan tool to monitor CVT fluid temperature.
• Slowly move the shifter through P-R-N-D, pausing 3 seconds in each position, then return to P.
• Bring CVT fluid temperature to 35–45°C (95–113°F).

Step 7: Set the CVT fluid level (critical step)

• With the engine running, vehicle level on stands, and temp at 35–45°C (95–113°F), place the drain pan under the level check area.
• Remove the CVT level check plug using the correct-size socket and a 3/8" drive ratchet.
• Correct level behavior:
• If fluid barely dribbles out, the level is close.
• If nothing comes out, add CVT fluid through the fill port using the fluid transfer pump (specialty) until it begins to dribble from the level check opening.
• If a strong stream pours out, let it drain until it becomes a thin dribble.
• Install a new CVT level check plug crush washer, then reinstall the plug.
• Tighten using a 3/8" drive torque wrench: Torque to 15 Nm (11 ft-lbs).

Step 8: Final fill plug install

• Remove the fill plug again if needed, install a new CVT fill plug crush washer, then reinstall the fill plug.
• Tighten using a 1/2" drive torque wrench: Torque to 50 Nm (37 ft-lbs).
• Clean any spilled fluid using shop rags and brake cleaner spray.

Step 9: Reinstall under cover and lower the vehicle

• Reinstall the under cover using the trim clip tool and metric socket set with a 3/8" drive ratchet.
• Lower the car safely using the floor jack (rated 3-ton minimum).

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✅ After Repair

• Test drive 10–15 minutes, then re-check underneath for any seepage at the plugs.
• Re-scan for codes using the OBD2 scan tool; address any transmission-related codes before continuing to drive.
• Tip: Small leaks show best on a clean case.

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💰 DIY vs Shop Cost

Shop Cost: $350-$650 (parts + labor)

DIY Cost: $120-$220 (parts only)

You Save: $230-$430 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

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