2018 Nissan Altima — Transmission Fluid & Service

Quick answer

• Transmission: Jatco CVT8 — JF016E (2.5L/RE0F10D) or JF017E (3.5L/RE0F10E)
• OEM fluid spec: Nissan Genuine CVT Fluid NS-3 (blue label) only
• Drain & fill capacity: about 4.0–5.0 qt (3.8–4.7 L), typically ~4.3 qt removed on a level car
• Full overhaul/dry capacity: approx. 7.8 qt (7.4 L) for JF016E; approx. 8.7–9.0 qt (8.2–8.5 L) for JF017E
• Filter: internal pan strainer + external cooler-return filter (part numbers vary by VIN; verify with dealer or service manual)
• Recommended service interval: Inspect fluid every 30,000 miles; drain & fill every 60,000 miles (severe use) or 60,000–90,000 miles (normal) for longevity

Fluid type explained

Your 2018 Altima uses a Jatco CVT8 continuously variable transmission. Nissan specifies NS-3 CVT fluid for this generation. NS-3 is a low-viscosity, specially friction-modified fluid engineered for the steel belt/pulley system, pressure control, and step logic programming used in the CVT8. Do not use NS-2, Dexron/Mercon, “universal” ATF, or any additive packages—mixing or substituting fluid can cause shudder, belt slip, overheating, and premature failure.

Aftermarket fluids labeled explicitly as “NS-3 compatible” exist, but for best results (and to maintain any remaining warranty or goodwill), stick with Nissan Genuine CVT Fluid NS-3.

Capacity notes:

• Drain & fill: A single pan drain typically removes ~4–5 quarts because substantial fluid remains in the torque converter, cooler, and valve body. Always measure what you drain and start by refilling the same amount, then perform a level check at temperature.
• Full/dry: Only reached during a full overhaul or after a complete teardown. Don’t try to hit the dry-fill number during routine service.

Service procedure

Two practical approaches: a standard drain & fill, or a staged cooler-line exchange using only fresh NS-3. Avoid chemical flushes or high-pressure machines.

Drain & fill (most common)

1. Preparation

• Parts/fluids: 5 quarts of Nissan NS-3, new drain plug crush washer, brake cleaner, gloves, drain pan.
• Tools: torque wrench, basic metric sockets, funnel with hose suitable for CVT, OBD-II scan tool capable of reading CVT fluid temperature (or equivalent service tool).

2. Drain

• Warm the car with a short drive, then park on a level surface and safely raise/support if needed.
• Remove the CVT pan drain plug and capture the fluid in a marked container so you can read the exact volume removed. Replace the crush washer and reinstall the plug to spec (refer to the service manual for the correct torque).

3. Fill (initial)

• Access the CVT fill point (on CVT8 it’s on the top/front of the case under the intake ducting). Add exactly what you drained out.

4. Circulate and level-check

• Start the engine, foot on brake, cycle the shifter slowly through all ranges, pausing 3–5 seconds in each, then return to Park.
• Using a scan tool, monitor CVT fluid temperature. The level check window is typically around 95–113°F (35–45°C). With the vehicle level and engine idling, remove the level/overflow plug as specified in the service manual. A small steady stream that becomes a drip indicates correct level. If no fluid drips, add in small increments and recheck. Reinstall the plug once correct. (Plug locations and exact procedure vary—consult the Nissan service manual for your VIN.)

Optional staged exchange (for dark fluid)

• Perform the drain & fill above, drive a few hundred miles, repeat once or twice until the fluid appearance improves. This refreshes more of the total capacity without stressing the system.

Cooler-line exchange (shop method)

• A professional can perform a closed-loop exchange through the cooler lines using only NS-3 at the same fill temperature/level-check spec. No solvents or pressure flushing should be used.

Filter service

• The CVT8 uses an internal strainer in the pan and an external cooler-return filter on many Altimas. These are typically serviced during overhaul or when contamination is suspected. Part numbers vary by transmission and VIN—verify with a Nissan dealer or the factory service manual before ordering. If you remove the pan, clean the magnets and replace the pan gasket/seal as specified by the manual.

Service interval

• Normal driving: Nissan’s maintenance schedule calls for periodic inspection rather than a fixed replacement. As a preventive measure, a 60,000–90,000 mile drain & fill helps longevity.
• Severe service (frequent stop-and-go, hot climates, mountain driving, long idling, or carrying loads): Inspect every 30,000 miles and replace fluid about every 60,000 miles.
• Towing: While most Altimas aren’t used for heavy towing, any towing qualifies as severe service—use the 60,000-mile interval and consider adding an auxiliary cooler if regularly towing in hot climates.

Inspect fluid at each engine oil change: darkening, burnt odor, or metallic sheen indicates it’s time for service or diagnosis.

Common transmission problems (2018 Altima)

The 2018 model uses the updated CVT8, which is more robust than earlier units, but issues can still occur:

• Launch shudder/judder under light throttle: Often caused by fluid degradation or belt/pulley surface wear. TCM software updates and fluid service can help; advanced cases may need valve body or transmission repair. Common related DTCs include P17F0/P17F1.
• Overheating or “fail-safe” (limp) mode: Can result from restricted cooler flow, a sticking thermal control valve, or low/contaminated fluid. Verify cooler operation and fluid condition; avoid overfilling.
• Whine/howl that changes with road speed: May indicate bearing wear. Address early to prevent debris circulation.
• Delayed engagement or flare on tip-in: Can stem from low fluid, incorrect level, or valve body pressure control issues. Confirm level at temperature per the factory method before deeper diagnostics.
• TCM calibration/updates: Nissan has released updates that can improve shift/step logic and drivability. Always check for the latest software when diagnosing.

Using only NS-3, keeping the fluid clean, and maintaining correct level/temperature during service are the biggest life-extenders for these CVTs.

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