🔧 Transmission Fluid - Drain and Fill

Assumption: This procedure is for the CVT in your Sentra. The fluid service is a drain-and-refill, not a pan-drop with a filter change.

Fresh CVT fluid helps the transmission run cooler and smoother. Use only the correct Nissan-spec CVT fluid and follow the fill level check exactly, because overfilling or underfilling can cause shifting problems.

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

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⚠️ Safety & Precautions

• Work on a level surface and support the car securely with jack stands. Jack stands are metal supports that hold the vehicle up safely after lifting.
• The transmission fluid gets hot. Let the vehicle cool before opening any plugs.
• Keep dirt out of the transmission. Clean the area around every plug before removal.
• Use only the specified CVT fluid. Wrong fluid can damage the transmission.
• Battery disconnect is not required for this service.

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🔧 Required Tools

You'll need the following tools for this repair:

• 14mm socket
• 3/8-inch drive ratchet
• Drain pan
• Fluid transfer pump
• Torque wrench
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Shop rags
• Funnel
• Scan tool with transmission fluid temperature readout (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Nissan CVT fluid NS-3 - Qty: 5-6 quarts
• Drain plug crush washer - Qty: 1
• Fill plug crush washer - Qty: 1

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📋 Before You Begin

• Park on level ground.
• Set the parking brake and chock the rear wheels.
• Lift the front of the vehicle and support it on jack stands.
• Have the new fluid ready before you start draining.
• Have a scan tool ready to read transmission fluid temperature.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Warm the transmission slightly

• Start the engine and let it idle for a few minutes.
• Move the shifter through all positions, then leave it in Park.
• Warm fluid drains more completely.

Step 2: Raise and secure the vehicle

• Use the floor jack to lift the front of the Sentra.
• Place the vehicle on jack stands.
• Confirm it is stable before going underneath.

Step 3: Remove the drain plug

• Place the drain pan under the transmission.
• Use the 14mm socket and ratchet to remove the drain plug.
• Let the fluid drain fully.
• Replace the crush washer on the drain plug.
• Torque to 34 Nm (25 ft-lbs).

Step 4: Refill with new CVT fluid

• Locate the fill plug on the transmission.
• Use the 14mm socket and ratchet to remove the fill plug.
• Use the fluid transfer pump to pump in Nissan NS-3 CVT fluid.
• Start with about the same amount you drained out.
• Install the fill plug loosely for the level-check step.

Step 5: Set the fluid level correctly

• Start the engine and keep it idling.
• Use the scan tool with transmission fluid temperature readout to watch fluid temperature.
• When the fluid is at the correct service temperature range, remove the level/check plug if equipped or follow the fill-level procedure for your CVT.
• Top off fluid until it just begins to dribble from the level opening.
• Install the plug with a new crush washer if removed.
• Torque to 34 Nm (25 ft-lbs) for the fill plug, and 9.8 Nm (87 in-lbs) for the level/check plug if equipped.

Step 6: Verify the repair

• Cycle the shifter through all positions with the engine idling.
• Check underneath for leaks.
• Lower the vehicle.

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✅ After Repair

• Road test the Sentra gently.
• Check again for leaks after the test drive.
• If shift quality feels abnormal, recheck the fluid level with the correct temperature procedure.

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💰 DIY vs Shop Cost

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

DIY Cost: $60-$120 (parts only)

You Save: $120-$200 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1-2 hours.

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🎯 Ready to get started?

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