🔧 Crosstrek - CVT Transmission Fluid Drain & Fill

This service drains the old CVT fluid from the pan and refills with fresh Subaru-approved CVT fluid. It helps protect the CVT belt/pulleys, improves shift feel, and reduces wear—especially if you drive in heat, traffic, or hills.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

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⚠️ Safety & Precautions

• ⚠️ CVT fluid gets very hot—let the vehicle cool before opening plugs.
• ⚠️ The vehicle must be level when checking the final fluid level.
• ⚠️ Use jack stands—never work under a vehicle supported only by a jack.
• ⚠️ Keep everything clean—dirt in a CVT can cause expensive damage.
• ⚠️ Battery disconnect is not required for this service.

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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 (10-quart minimum)
• 17mm socket
• 3/8" drive ratchet
• Torque wrench (10–100 ft-lbs range)
• Trim clip tool
• Funnel with long flexible hose
• Shop rags
• Brake cleaner spray
• OBD2 scan tool with CVT fluid temp data (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Subaru CVT fluid (CVTF-II compatible) - Qty: 6 quarts
• CVT drain plug crush washer - Qty: 1

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📋 Before You Begin

• Park on a level surface, set the parking brake, and chock the rear wheels.
• Raise the front (or all four corners) and support with jack stands so the vehicle sits level.
• Set up your OBD2 scan tool (it plugs into the port under the dash and reads vehicle sensor data) so you can watch CVT fluid temperature.
• Clean tools + clean funnel = happy CVT.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower splash shield

• Use a trim clip tool to remove the plastic clips.
• Use a 3/8" drive ratchet with the correct fastener socket (as equipped) to remove any bolts, then set the shield aside.

Step 2: Locate the CVT drain plug and prep the area

• Place a drain pan (10-quart minimum) under the CVT pan drain plug.
• Use brake cleaner spray and shop rags to clean around the drain plug so dirt can’t fall in.

Step 3: Drain the old CVT fluid

• Use a 17mm socket and 3/8" drive ratchet to loosen and remove the drain plug.
• Let the fluid drain until it slows to an occasional drip (typically 10–20 minutes).
• Remove the old washer and install a new crush washer (a soft metal washer that seals when tightened).

Step 4: Reinstall and torque the drain plug

• Thread the drain plug in by hand first to avoid cross-threading.
• Use a torque wrench with a 17mm socket: Torque to 44 Nm (32 ft-lbs).
• Use brake cleaner spray to remove any spilled fluid so leaks are easy to spot later.

Step 5: Refill the CVT with fresh fluid

• Open the CVT fill point (commonly the CVT dipstick tube on this model, if equipped).
• Insert a funnel with long flexible hose and pour in Subaru CVT fluid (CVTF-II compatible).
• Start by adding about the same amount you drained (most drain-and-fills are roughly 5–6 quarts).
• Pour slowly to prevent burping/overflow.

Step 6: Warm up and circulate the fluid

• With the vehicle still level on jack stands, start the engine.
• Hold the brake and slowly move the shifter through P-R-N-D and back to P, pausing 2–3 seconds in each position.
• Use the OBD2 scan tool with CVT fluid temp data (specialty) to monitor CVT fluid temperature.

Step 7: Set the final fluid level (temperature-based check)

• Bring CVT fluid temperature to a warm operating check range (commonly 35–45°C (95–113°F)).
• If your Crosstrek has a CVT dipstick: With engine idling, remove the dipstick, wipe it with a shop rag, reinsert, then read the level and add fluid as needed using the funnel with long flexible hose.
• If your Crosstrek does NOT have a dipstick: The level is set using the CVT level/check plug procedure, which requires the correct check plug location and spec for your transmission case.
• Do not overfill—CVTs are sensitive to level.

Step 8: Reinstall the splash shield

• Reinstall the shield using the original clips/bolts.
• Use a trim clip tool to fully seat the clips.

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✅ After Repair

• Start the engine and inspect for leaks around the drain plug with safety glasses on.
• Road test 10–15 minutes, then recheck for leaks underneath.
• If you used a dipstick, recheck the level at the same temperature range and top off if needed.
• Keep a note of how many quarts you added.

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $70-$150 (parts only)

You Save: $180-$300 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?

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.

Assumption: This covers a standard CVT drain-and-fill using Subaru CVTF-II compatible fluid; level-setting method depends on whether your Crosstrek has a CVT dipstick or uses a case check plug.