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2019 G70 3.3T Transmission Fluid Change Interval & DIY Feasibility

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

Vehicle: 2019 Genesis G70 3.3T

Hey everyone,

I've got a 2019 Genesis G70 3.3T with about 55,000 miles on it. I'm starting to think about preventative maintenance and was wondering about the transmission fluid.

Is the transmission fluid in these G70s considered 'lifetime' fluid, or is there a recommended service interval? I've heard conflicting things and want to make sure I'm not neglecting anything important.

Also, for those who are mechanically inclined, is this a feasible DIY job? I've done fluid changes on other cars, but I know some modern transmissions can be tricky with sealed units and specific temperature checks. Any insights or experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

It's a great question, John, and one we hear often for modern Genesis vehicles, especially the 2019 G70 3.3T with its 8-speed automatic transmission.

  1. Understanding 'Lifetime' Fluid:

    • Genesis (and its parent company Hyundai/Kia) often designates transmission fluid as 'lifetime' under normal driving conditions. However, 'lifetime' in the automotive industry typically refers to the expected lifespan of the first owner or around 100,000 miles.
    • For severe driving conditions (e.g., frequent short trips, stop-and-go traffic, towing, mountainous terrain, extreme temperatures), the manufacturer does recommend inspection and potential replacement. Many owners, especially those who plan to keep their G70 long-term, opt for a fluid change between 60,000 to 90,000 miles, regardless of official 'lifetime' claims. This is a proactive measure to ensure longevity.

  2. DIY Feasibility:

    • The 8-speed automatic transmission in your G70 is a sealed unit, meaning it doesn't have a traditional dipstick for checking fluid level.
    • A proper transmission fluid change typically involves:
      • Draining the old fluid (often only a partial drain, as a full flush requires specialized equipment).
      • Replacing the transmission filter (if accessible, some are internal).
      • Refilling with the correct fluid type (typically Hyundai/Kia SP-IV RR or an equivalent full synthetic multi-vehicle fluid that meets the specification).
      • Crucially, checking and setting the fluid level at a very specific temperature range using a diagnostic scanner to monitor transmission fluid temperature. This often involves an overflow plug procedure.
    • While technically possible for an experienced DIYer with the right tools (including a scanner to monitor temperature), it's more complex than a simple engine oil change. Incorrect fluid level or type can lead to significant transmission issues.

  3. When to See a Shop:

    • If you're not comfortable with the specific temperature monitoring and fill procedure, or if you don't have the necessary diagnostic tools, it's highly recommended to take your G70 to a qualified Genesis dealership or an independent shop specializing in Hyundai/Kia/Genesis vehicles.
    • They have the correct equipment, fluids, and expertise to perform the service properly, ensuring your transmission's health and warranty (if applicable).
    • Also, if you're experiencing any unusual shifting, hesitation, or noise from the transmission, get it inspected by a professional immediately, as this could indicate a more serious issue.
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