🔧 Altima - CVT Transmission Fluid Change

This service drains the old CVT fluid and refills your Altima with fresh Nissan NS-3 compatible CVT fluid. The most important parts are using the correct fluid and setting the level with the fluid at the correct temperature.

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

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⚠️ Safety & Precautions

• ⚠️ Use only Nissan NS-3 CVT fluid. Regular automatic transmission fluid can damage the CVT.
• ⚠️ Never rely on a jack alone. Always support your Altima with jack stands.
• ⚠️ Keep the vehicle level when checking fluid level.
• ⚠️ CVT fluid can burn your skin if hot. Wear gloves and safety glasses.
• ⚠️ Do not pressure-flush the CVT. A drain-and-refill is the safer DIY method.
• ⚠️ Battery disconnect is not required for this repair.

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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
• Safety glasses
• Nitrile gloves
• Drain pan (8-quart minimum)
• 19mm socket
• 10mm socket
• Ratchet wrench 3/8-inch drive
• Torque wrench 3/8-inch drive
• Long-neck transmission funnel
• Fluid transfer pump (specialty)
• OBD2 scan tool with live data (specialty)
• Flat-blade screwdriver
• Clean shop towels
• Measuring jug marked in quarts

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Nissan NS-3 CVT fluid - Qty: 5 quarts
• CVT drain plug washer - Qty: 1
• Under-engine splash shield clips - Qty: As needed

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📋 Before You Begin

• Park your Altima on flat, level ground.
• Set the parking brake and place wheel chocks behind the rear wheels.
• Raise the front with a floor jack (rated 2-ton minimum), then support it with jack stands (rated 2-ton minimum).
• For the final fluid level check, your Altima must be level with the engine idling.
• An OBD2 scan tool with live data reads the transmission fluid temperature from the vehicle computer.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the Lower Splash Shield

• Put on safety glasses and nitrile gloves.
• Use a 10mm socket and ratchet wrench 3/8-inch drive to remove the lower splash shield bolts.
• Use a flat-blade screwdriver to gently release plastic clips if fitted.
• Set the splash shield aside.
• Take a photo first.

Step 2: Drain the CVT Fluid

• Place a drain pan (8-quart minimum) under the CVT drain plug.
• Use a 19mm socket and ratchet wrench 3/8-inch drive to loosen the drain plug.
• Remove the plug by hand and let the fluid drain fully.
• Use a measuring jug marked in quarts to measure the amount drained.
• Refill the same amount first.

Step 3: Reinstall the Drain Plug

• Remove the old washer from the drain plug.
• Install a new CVT drain plug washer.
• Thread the plug in by hand first to avoid cross-threading.
• Use a 19mm socket and torque wrench 3/8-inch drive to tighten it.
• Torque to 34 Nm (25 ft-lbs).

Step 4: Add New CVT Fluid

• Open the hood and locate the CVT fill tube/dipstick area.
• If the cap has a lock tab, use a flat-blade screwdriver gently to release it.
• Place a long-neck transmission funnel into the fill tube.
• Add the same amount of Nissan NS-3 CVT fluid that came out.
• Use a fluid transfer pump (specialty) if the funnel access is tight.
• Pour slowly to prevent spills.

Step 5: Warm the Fluid and Cycle the Shifter

• Connect the OBD2 scan tool with live data (specialty) to the diagnostic port under the dashboard.
• Start the engine and keep your foot firmly on the brake pedal.
• Move the shifter slowly through P-R-N-D-L, pausing 3 seconds in each position.
• Return the shifter to P.
• Watch CVT fluid temperature on the scan tool.
• Target level-check temperature is about 35-45°C (95-113°F).

Step 6: Check and Adjust Fluid Level

• Keep the engine idling and keep your Altima level.
• Use clean shop towels to wipe the dipstick clean if equipped with a service dipstick.
• Insert the dipstick fully, then remove it and read the level.
• If low, add Nissan NS-3 CVT fluid in small amounts using the long-neck transmission funnel.
• If overfilled, remove a small amount through the fill tube using the fluid transfer pump (specialty).
• Add small amounts only.

Step 7: Reinstall the Splash Shield

• Shut the engine off once the fluid level is correct.
• Use clean shop towels to wipe spilled fluid from the transmission and shield.
• Reinstall the splash shield.
• Use a 10mm socket and ratchet wrench 3/8-inch drive to tighten the splash shield bolts snugly.

Step 8: Lower the Vehicle

• Use the floor jack (rated 2-ton minimum) to lift your Altima 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

• Start the engine and check the drain plug area for leaks.
• Take a gentle 10-minute test drive.
• Recheck underneath for leaks after the test drive.
• Dispose of old CVT fluid at a recycling center or auto parts store.
• If you feel shuddering, slipping, delayed engagement, or hear whining, stop driving and scan the CVT for codes.

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💰 DIY vs Shop Cost

Shop Cost: $180-$320 (parts + labor)

DIY Cost: $70-$130 (parts only)

You Save: $110-$190 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?

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.