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Transmission Fluid Change on 2020 G70 3.3T - 'Lifetime' or Service?

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Amanda S. · rep 0 · May 22, 6:22 AM · 1 replies · solved · Question

Vehicle: 2020 Genesis G70 3.3T

Hey everyone,

I've got a 2020 Genesis G70 3.3T with around 58,000 miles on the odometer. I'm trying to be proactive with maintenance, especially since it's a performance model.

I've been looking into transmission fluid service, and I'm getting some really conflicting information. Some sources, including what I've heard from a dealership, suggest the fluid is 'lifetime' and never needs changing. Others, especially in enthusiast forums, recommend changing it around 60,000 to 80,000 miles, particularly for cars driven hard or in stop-and-go traffic.

What's the consensus here for a 2020 G70 3.3T? Is it truly a 'lifetime' fluid, or should I be looking to get it serviced soon? If it does need changing, is this a DIY job, or is it best left to a professional shop? Any advice from other Genesis owners would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

This is a common and excellent question for Genesis owners, especially concerning the 'lifetime' fluid claim. While Genesis (and its parent company Hyundai/Kia) often states that automatic transmission fluid is 'filled for life,' this typically refers to the expected life of the warranty period or a general service life under ideal conditions, not necessarily the entire lifespan of the vehicle if you intend to keep it long-term.

Here's what you should know:

  1. Understanding 'Lifetime' Fluid: For optimal transmission longevity, especially in a performance vehicle like your 2020 Genesis G70 3.3T, changing the transmission fluid is highly recommended. Heat and stress from driving, towing, or even just heavy city traffic can degrade the fluid over time, reducing its lubricating and cooling properties.
  2. Recommended Service Interval: For severe driving conditions (which can include frequent short trips, stop-and-go traffic, or spirited driving), we recommend considering a transmission fluid change between 60,000 to 80,000 miles. For more moderate driving, extending this to 100,000 miles is generally acceptable, but earlier is always better for preventative maintenance.
  3. Why It's Not a Simple DIY:
    • Specific Fluid Type: Genesis transmissions require very specific fluid types (e.g., Hyundai SP-IV RR or similar high-performance synthetic fluids). Using the wrong fluid can cause significant damage.
    • No Dipstick: Most modern Genesis transmissions do not have a traditional dipstick, making fluid level checks and fills complex.
    • Temperature-Dependent Fill: The fluid level must be checked and adjusted at a specific transmission temperature range, often requiring diagnostic tools to monitor.
    • Drain and Fill vs. Flush: A simple drain and fill replaces only a portion of the fluid. A full flush (often done with specialized equipment) replaces more, but must be done correctly to avoid issues.

When to See a Shop: Given the complexities, we strongly advise having your transmission fluid serviced by a qualified professional. A Genesis or Hyundai dealership, or an independent shop specializing in these vehicles, will have the correct tools, fluid, and expertise to perform the service properly. This ensures your G70's transmission continues to operate smoothly and reliably for many more miles.

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