The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2018 G80 Transmission Fluid Change - DIY or Dealer?

0

Chris P. · rep 0 · May 22, 6:22 AM · 1 replies · solved · Question

Vehicle: 2018 Genesis G80 3.8L

Hey everyone, I have a 2018 Genesis G80 3.8L with about 75,000 miles on it. I'm wondering about the transmission fluid. The owner's manual seems a bit vague on a specific change interval for 'normal' driving conditions, often suggesting 'inspect' rather than 'replace' unless under severe conditions.

I've heard varying opinions online – some say it's 'lifetime' fluid, others recommend changing it every 60k-80k miles. I'm pretty handy and have done fluid changes on other cars, but this is my first Genesis. Is this something a competent DIYer can tackle, or is it best left to the dealer due to special tools, specific fluid types, or complex procedures?

Also, what's the recommended fluid type for this model? I want to make sure I use the correct one if I do attempt it myself. Any advice or experiences would be greatly appreciated!

✓ Accepted solution

ClearTheCode Admin

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

0

ClearTheCode admin answer:

It's a common misconception that modern automatic transmission fluid (ATF) is truly "lifetime." While manufacturers often state this for normal driving conditions, proactive maintenance can significantly extend the life of your transmission. For your 2018 Genesis G80 3.8L, even under normal driving, we generally recommend considering a transmission fluid drain and fill (not a full flush, which can sometimes cause issues if done incorrectly or on high-mileage transmissions) around the 60,000 to 80,000-mile mark. If you frequently drive in severe conditions (heavy towing, stop-and-go traffic, extreme temperatures), this interval should be shorter.

Here's what to consider:

  1. Fluid Type: For your G80, you'll need a specific ATF. Genesis (and Hyundai/Kia) typically uses fluids meeting the SP-IV or SP-IVM specification. Always double-check your owner's manual or consult a Genesis parts department with your VIN to confirm the exact fluid required. Using the wrong fluid can lead to serious transmission damage.
  2. DIY Complexity: While a drain and fill might seem straightforward, modern Genesis transmissions can be more complex than older vehicles.
    • No Dipstick: Many newer transmissions lack a traditional dipstick, requiring specific procedures to check the fluid level at a certain temperature using a diagnostic tool.
    • Fill Port Location: Accessing the fill and drain plugs can sometimes require removing other components.
    • Temperature Sensitivity: The fluid level check is highly sensitive to transmission temperature, often requiring an OBD-II scanner to monitor the transmission fluid temperature (TFT).
    • Pan Gasket/Filter: If you decide to drop the pan to replace the filter (recommended during a fluid change), ensure you have the correct gasket and torque specifications.
  3. When to See a Shop:
    • If you're not comfortable with the specific temperature-based level checking procedure or don't have access to an appropriate diagnostic scanner.
    • If you're unsure about the correct fluid type.
    • If you notice any unusual shifting, slipping, or noises from the transmission before or after the fluid change.
    • For a full transmission fluid flush, it's almost always best to go to a professional shop with the right equipment.

A drain and fill can be a good preventative measure, but due to the specific requirements for fluid type and level checking, many owners opt for a professional service to ensure it's done correctly.

Menu

Help & account