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2020 G70 3.3T Transmission Fluid Service - Is it really 'lifetime'?

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Mike T. · rep 0 · May 24, 3:41 PM · 1 replies · solved · Question

Vehicle: 2020 Genesis G70 3.3T

Hey everyone,

I've got a 2020 Genesis G70 3.3T, and it's just about to hit 60,000 miles. I've been doing all my regular maintenance, but I'm starting to think about the transmission fluid. I've heard some conflicting things – some say it's 'lifetime' fluid and never needs changing, while others suggest it's crucial to service it around this mileage.

What's the general consensus here for our G70s? Is the 'lifetime' claim true, or should I be looking to get it changed soon? If so, what type of fluid is recommended, and is this something a competent DIYer could tackle, or is it best left to the dealership?

Any advice from those who've been through this would be greatly appreciated. I want to keep my G70 running strong for many more miles!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 24, 3:41 PM

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ClearTheCode admin answer:

The concept of 'lifetime' transmission fluid is a common point of confusion among vehicle owners, and it's rarely truly 'lifetime' in the context of the vehicle's full operational lifespan. For your 2020 Genesis G70 3.3T, while Genesis (and Hyundai/Kia, given their shared powertrain) may state a very long or 'no service' interval under normal conditions, it's generally recommended to service the transmission fluid, especially as you approach or exceed 60,000 miles.

Here's what you need to know:

  1. 'Lifetime' Fluid Misconception: 'Lifetime' often refers to the expected lifespan of the primary warranty period, or a certain mileage under ideal conditions, not necessarily the entire life of the vehicle. Transmission fluid degrades over time and with use, losing its lubricating and cooling properties due to heat, friction, and contamination.

  2. Recommended Service Interval: For severe driving conditions (e.g., heavy city traffic, towing, mountainous terrain, extreme temperatures), Genesis often recommends a transmission fluid inspection or replacement around 60,000 miles. Even under 'normal' conditions, many independent shops and experienced owners recommend a drain and fill between 60,000 to 100,000 miles to proactively maintain the transmission.

  3. Fluid Type: Your 2020 Genesis G70 3.3T with the 8-speed automatic transmission typically requires a specific type of fluid. You should use genuine Hyundai/Kia SP-IV RR (Reduced Viscosity) ATF or an equivalent fluid that explicitly states compatibility with this specification. Using the wrong fluid can cause significant transmission damage.

  4. DIY vs. Professional Service: A simple drain and fill can be a DIY task for those with mechanical experience, proper tools, and a way to safely lift the vehicle. It's crucial to measure the amount drained and refill with the exact same amount. However, a full fluid flush (which replaces nearly all the fluid) is often best performed by a professional shop with specialized equipment to avoid air pockets or damage. The G70's transmission does not have a traditional dipstick, so checking the fluid level requires specific procedures, often involving a temperature-controlled fill process through an overflow plug, which can be tricky for DIY.

  5. When to See a Shop: If you're experiencing any symptoms like delayed shifts, harsh shifting, slipping, or unusual noises, take your G70 to a qualified Genesis technician immediately. These could be signs of advanced fluid degradation or internal transmission issues that require professional diagnosis and repair. Ignoring these symptoms can lead to more costly repairs down the line.

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