🔧 Altima - CVT Transmission Fluid Change

This service replaces the continuously variable transmission fluid in your Altima’s CVT. Fresh Nissan-approved CVT fluid helps protect the belt, pulleys, valve body, and AWD drivetrain from wear and overheating.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours

Assumption: This is a drain-and-fill service, not a complete machine flush.

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⚠️ Safety & Precautions

• ⚠️ CVT fluid level is temperature-sensitive; the fluid must be checked at the correct temperature range using a scan tool or capable OBD-II live-data reader.
• ⚠️ Use only Nissan-approved CVT fluid for this CVT. The wrong fluid can cause shudder, slipping, or transmission damage.
• ⚠️ Never work under your Altima supported only by a jack. Use jack stands on solid, level ground.
• ⚠️ CVT fluid can be hot. Wear gloves and safety glasses.
• ⚠️ Do not perform a power flush. A drain-and-fill is the safer DIY service method.
• ⚠️ 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
• 10mm socket
• 19mm socket
• Ratchet wrench 3/8-inch drive
• Torque wrench 3/8-inch drive
• Drain pan 10-quart minimum
• Fluid transfer pump (specialty)
• Long-neck funnel
• OBD-II scan tool with transmission fluid temperature live data (specialty)
• Infrared thermometer
• Measuring jug marked in quarts
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Nissan-approved CVT fluid - Qty: 5 quarts
• CVT drain plug sealing washer - Qty: 1
• Underbody shield clips - Qty: as needed

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📋 Before You Begin

• Park your Altima on level ground. Level ground matters because CVT fluid level is checked by height inside the transmission.
• Set the parking brake and place wheel chocks behind the rear wheels.
• Let the transmission cool if you recently drove. Warm is okay; too hot can burn you and overfill readings can be inaccurate.
• Connect the OBD-II scan tool before starting so you can monitor CVT fluid temperature. An OBD-II scan tool plugs into the diagnostic port and reads vehicle sensor data.
• Do not use the infotainment screen for this repair. No service menu setting is required.

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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 your Altima at the correct front jacking point.
• Place jack stands under the approved support points.
• Lower the vehicle gently onto the jack stands.
• Use the floor jack to raise the rear if needed so the vehicle sits level front-to-back and side-to-side.
• Keep the wheel chocks in place.
• Level car equals correct fluid level.

Step 2: Remove the Lower Engine Cover

• Use a 10mm socket and ratchet wrench to remove the lower splash shield bolts.
• Use your hands to release any plastic clips carefully.
• Set the shield aside where it will not get stepped on.

Step 3: Locate the CVT Drain Plug

• Put on safety glasses and nitrile gloves.
• Place the 10-quart drain pan under the transmission drain plug.
• The CVT drain plug is on the lower transmission case, not the engine oil pan.
• Wipe the area with shop towels so dirt does not enter the transmission.

Step 4: Drain the Old CVT Fluid

• Use a 19mm socket and ratchet wrench to loosen the CVT drain plug.
• Remove the plug by hand once loose, keeping pressure inward until the last thread to reduce splashing.
• Allow the CVT fluid to drain until it slows to a drip.
• Use the measuring jug to measure how much fluid came out.
• Refill close to the drained amount first.

Step 5: Reinstall the Drain Plug

• Remove the old sealing washer from the drain plug by hand.
• Install the new CVT drain plug sealing washer.
• Thread the plug into the transmission by hand first to avoid cross-threading.
• Use a torque wrench with a 19mm socket to tighten the drain plug to Torque to 34 Nm (25 ft-lbs).

Step 6: Refill the CVT

• Open the CVT fill port or dipstick tube area, depending on cap style installed on your Altima.
• Use a long-neck funnel or fluid transfer pump to add Nissan-approved CVT fluid.
• Add slightly less than the measured drained amount at first.
• Example: if 4.0 quarts drained out, add about 3.7-3.8 quarts first.
• Reinstall the fill cap loosely for the warm-up step.

Step 7: Warm the Transmission Fluid

• Connect the OBD-II scan tool to the diagnostic port under the driver side dashboard.
• Start the engine and keep your foot firmly on the brake pedal.
• Use the scan tool to view transmission fluid temperature live data.
• Move the shifter slowly through Park, Reverse, Neutral, Drive, and back to Park.
• Pause about 3 seconds in each position.
• Keep the engine idling while watching CVT fluid temperature.

Step 8: Check and Set Fluid Level

• Keep the vehicle level and the engine idling.
• Use the OBD-II scan tool to confirm CVT fluid temperature is in the normal level-check range, typically about 35-45°C (95-113°F).
• If your Altima has a dipstick, remove it, wipe it with a shop towel, reinstall it fully, then remove it again to read the level.
• If your Altima uses a level plug system, remove the level/check plug with the correct socket while the engine idles and the fluid is in temperature range.
• Use the fluid transfer pump to add CVT fluid in small amounts until the level is correct.
• Correct level is reached when the dipstick shows proper hot range, or when a thin stream/drip exits the level port on a level-plug setup.
• Do not overfill. Overfilled CVT fluid can foam and cause shifting problems.

Step 9: Final Tightening and Cleanup

• Reinstall the CVT fill cap or dipstick securely by hand.
• If a level/check plug was removed, reinstall it and tighten with a torque wrench to the factory specification for the plug style fitted.
• Use shop towels to clean any spilled fluid from the transmission case.
• Use the 10mm socket and ratchet wrench to reinstall the lower engine cover.
• Do not overtighten splash shield bolts; snug is enough for plastic covers.

Step 10: Lower the Vehicle

• Use the floor jack to raise your Altima slightly off the jack stands.
• Remove the jack stands.
• Lower the vehicle slowly onto level ground.
• Remove the wheel chocks.

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✅ After Repair

• Start your Altima and let it idle for one minute.
• With your foot on the brake, shift through all gear positions again.
• Take a gentle 10-15 minute test drive. Avoid hard acceleration.
• Park on level ground and check underneath for leaks around the drain plug.
• If you have a capable scan tool, check for transmission-related diagnostic trouble codes.
• Dispose of old CVT fluid at a recycling center or auto parts store that accepts used fluids.

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💰 DIY vs Shop Cost

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

DIY Cost: $80-$160 (parts only)

You Save: $170-$290 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 hours.

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🎯 Ready to get started?

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