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2020 Lincoln Nautilus Transmission Fluid Change - Is it 'Lifetime'?

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Jennifer H. · rep 0 · May 22, 6:09 AM · 1 replies · solved · Question

Vehicle: 2020 Lincoln Nautilus Reserve

Hey everyone,

I have a 2020 Lincoln Nautilus Reserve with the 2.7L engine. It's got about 65,000 miles on it now, and I'm starting to think about some of the bigger maintenance items.

I'm trying to figure out the recommended interval for changing the transmission fluid. Some sources, including what I've heard from a few dealerships, suggest it's a 'lifetime' fluid, but I'm pretty skeptical about that claim for any vehicle I plan to keep long-term.

What's the general consensus here? Has anyone with a similar model year Nautilus done this service? If so, what fluid did you use, and did you go with a simple drain and fill or a full flush? I want to keep this car running smoothly for a long time, and proper transmission maintenance seems crucial.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 6:09 AM

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ClearTheCode admin answer:

John, that's an excellent question and a common point of confusion for many owners. The term 'lifetime fluid' is often misleading; it generally means the fluid is designed to last the expected service life of the vehicle, which doesn't always align with how long an owner intends to keep it. For optimal longevity and performance of your 2020 Lincoln Nautilus's transmission, regular fluid changes are highly recommended.

Here's what you should know:

  1. Recommended Interval: While Lincoln's official maintenance schedule might not list a specific interval for 'normal' driving conditions, for 'severe duty' (which includes frequent short trips, towing, heavy city driving, or driving in extreme temperatures), Ford/Lincoln typically recommends a transmission fluid and filter change every 60,000 to 100,000 miles. Given your mileage, it's a good time to consider it.
  2. Fluid Type: Your 2020 Nautilus likely uses MERCON® ULV Automatic Transmission Fluid. It's crucial to use the correct fluid specification to prevent damage and ensure proper shifting. Always double-check your owner's manual or the transmission dipstick (if equipped) for the exact specification.
  3. Drain and Fill vs. Flush:
    • Drain and Fill: This is the simpler method, replacing only the fluid that drains out of the pan (typically 40-60% of the total capacity). It's less invasive and can be done more frequently. Many DIYers opt for this, sometimes performing it twice over a short period to replace more of the old fluid.
    • Full Flush: This method uses a machine to exchange nearly all the old fluid with new. While more comprehensive, it can sometimes dislodge debris in older, neglected transmissions, potentially causing issues. For a well-maintained vehicle like yours, it's generally safe, but ensure it's done by a reputable shop.
  4. When to See a Shop:
    • If you're not comfortable performing the service yourself or lack the proper tools (e.g., a lift, specific wrenches, or a fluid pump for refilling).
    • If you notice any unusual shifting, slipping, or delayed engagement, as these could indicate underlying issues that require professional diagnosis.
    • If your vehicle has never had a transmission fluid change and has very high mileage (e.g., over 120,000 miles), a professional assessment is wise before a flush.
    • If you experience any warning lights related to the powertrain or transmission (e.g., check engine light with codes like P0700 series), get it diagnosed immediately.

Proactive maintenance, like changing your transmission fluid, is key to extending the life of your Nautilus and avoiding costly repairs down the road.

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