🔧 Altima - CVT Fluid Replacement

This repair replaces the continuously variable transmission fluid, called CVT fluid, in your Altima. The CVT uses a steel belt and pulleys instead of normal gears, so it must use the correct Nissan-compatible CVT fluid.

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

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⚠️ Safety & Precautions

• ⚠️ Use only Nissan NS-3 compatible CVT fluid. Do not use regular automatic transmission fluid.
• ⚠️ CVT fluid level is temperature-sensitive. The final level check should be done with the fluid around 35-45°C / 95-113°F.
• ⚠️ Keep the vehicle level while draining and filling. A tilted vehicle can cause the wrong fluid level.
• ⚠️ Hot CVT fluid can burn skin. Wear gloves and safety glasses.
• ⚠️ Never work under your Altima with only a jack holding it up. Use jack stands.
• ⚠️ 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 2-ton minimum
• Jack stands rated 2-ton minimum
• Wheel chocks
• 10mm socket
• 19mm socket
• 3/8-inch ratchet
• 3/8-inch torque wrench
• Flat-head screwdriver
• Plastic trim clip remover
• Drain pan 10-quart minimum
• Long-neck funnel
• Clean graduated measuring container
• OBD2 scan tool with live CVT fluid temperature display
• Infrared thermometer
• Nitrile gloves
• Safety glasses
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Nissan NS-3 compatible CVT fluid - Qty: 5 quarts for drain-and-fill, up to 9 quarts if pan service is added
• CVT drain plug crush washer - Qty: 1
• CVT dipstick tube cap locking clip - Qty: 1 if damaged or missing

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📋 Before You Begin

• 🅿️ Park your Altima on a level surface and set the parking brake.
• 🧱 Place wheel chocks behind the rear wheels.
• 🌡️ Drive for 10-15 minutes so the CVT fluid is warm, not scorching hot.
• 📏 Measure the drained fluid amount so you can refill the same amount first, then fine-tune the level.
• 🔍 A scan tool reads live data from the vehicle computer. For this job, it is used to see the actual CVT fluid temperature.
• 🧰 This procedure covers a standard drain-and-fill service, not a full flush. A flush is not recommended for a first-time DIY service on this CVT.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise and Support the Vehicle

• Use the floor jack rated 2-ton minimum to lift the front of your Altima at the front center jacking point.
• Place jack stands rated 2-ton minimum under the proper front pinch weld support points.
• Lower the vehicle gently onto the stands.
• Use wheel chocks behind the rear wheels.
• Shake gently to confirm stability.

Step 2: Remove the Lower Splash Shield

• Use a 10mm socket and 3/8-inch ratchet to remove the splash shield bolts.
• Use a plastic trim clip remover or flat-head screwdriver to remove the plastic clips.
• Set the shield and fasteners aside in order.
• Take a quick photo first.

Step 3: Locate the CVT Drain Plug

• Look under the transmission case on the driver-side/front area for the CVT drain plug.
• Place the drain pan 10-quart minimum directly under the plug.
• Use safety glasses and nitrile gloves before loosening the plug.

Step 4: Drain the Old CVT Fluid

• Use a 19mm socket and 3/8-inch ratchet to loosen and remove the CVT drain plug.
• Let the fluid drain until it slows to a drip.
• Use the clean graduated measuring container to measure exactly how much fluid came out.
• Clean the drain plug with shop towels.
• Install a new CVT drain plug crush washer.

Step 5: Reinstall the Drain Plug

• Thread the drain plug in by hand first to avoid cross-threading.
• Use the 19mm socket and 3/8-inch torque wrench to tighten the drain plug.
• Torque to 34 Nm (25 ft-lbs).
• Wipe the area clean with shop towels so leaks are easier to spot later.

Step 6: Access the CVT Fill Tube

• Open the hood and locate the CVT dipstick/fill tube near the transmission side of the engine bay.
• If equipped with a locking dipstick cap, use a flat-head screwdriver to carefully release the small locking tab.
• Remove the dipstick or cap.
• Insert the long-neck funnel into the fill tube.

Step 7: Add New CVT Fluid

• Add the same amount of Nissan NS-3 compatible CVT fluid that drained out using the long-neck funnel.
• Pour slowly to prevent spills or air pockets.
• Start with slightly less than the measured drained amount if you are unsure.
• It is easier to add than remove.

Step 8: Warm the CVT Fluid for Level Check

• Connect the OBD2 scan tool with live CVT fluid temperature display to the diagnostic port under the driver-side dash.
• Start the engine and keep your foot firmly on the brake.
• Move the shifter slowly through P-R-N-D, pausing 3 seconds in each position, then return to P.
• Watch the CVT fluid temperature on the scan tool.
• The level check should be done around 35-45°C / 95-113°F.
• If your scan tool cannot read CVT temperature, use an infrared thermometer on the transmission pan as a backup estimate, but scan-tool temperature is preferred.

Step 9: Check the Fluid Level

• With the engine idling, transmission in P, and vehicle level, remove the dipstick or cap.
• Wipe the dipstick with shop towels, reinstall fully, then remove again to read the level.
• The fluid should be within the marked range for warm CVT fluid.
• If low, add Nissan NS-3 compatible CVT fluid in small amounts using the long-neck funnel.
• If overfilled, drain a small amount from the drain plug using the 19mm socket, then retorque the plug to 34 Nm (25 ft-lbs).

Step 10: Reinstall the Cap and Splash Shield

• Reinstall the CVT dipstick or fill tube cap by hand.
• If the locking clip was damaged, install a new CVT dipstick tube cap locking clip.
• Use the 10mm socket and 3/8-inch ratchet to reinstall the lower splash shield bolts.
• Reinstall the plastic clips using your hands or the plastic trim clip remover.
• Snug the splash shield fasteners; do not overtighten plastic clips.

Step 11: Lower the Vehicle

• Use the floor jack rated 2-ton minimum to raise the vehicle slightly off the jack stands.
• Remove the jack stands rated 2-ton minimum.
• Lower your Altima slowly to the ground.
• Remove the wheel chocks.

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✅ After Repair

• ✅ Test drive gently for 10-15 minutes. Avoid hard acceleration.
• ✅ Recheck underneath for leaks around the CVT drain plug.
• ✅ Recheck the CVT level at the correct fluid temperature if shifting feels unusual.
• ✅ Dispose of old CVT fluid at a recycling center or parts store that accepts used oil.
• ✅ If the CVT shudders, slips, whines, or has metal debris in the drained fluid, stop driving and have the CVT diagnosed.

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💰 DIY vs Shop Cost

Shop Cost: $220-$380 (parts + labor)

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

You Save: $140-$220 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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