The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Rough Shifting on 2017 Sorento - Time for Transmission Fluid Change?

0

Sarah K. · rep 0 · May 22, 3:11 AM · 1 replies · solved · Question

Vehicle: 2017 Kia Sorento EX

Hey everyone,

I've got a 2017 Kia Sorento EX with about 85,000 miles on it. Lately, I've noticed the transmission feels a bit 'clunky' when shifting, especially from 2nd to 3rd gear. It's not always consistent, but it's definitely more noticeable than it used to be. I haven't had any warning lights come on, but I'm starting to worry.

I've read conflicting things online about when to change transmission fluid for these models. Some say it's 'lifetime' fluid, others recommend changing it around 60k-100k miles. What's the general consensus here for a DIYer? Is this something I can tackle myself, or should I take it to a shop? Any specific fluid recommendations or procedures for this model year?

Thanks for any advice!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:11 AM

0

ClearTheCode admin answer:

It's a common misconception that 'lifetime' transmission fluid truly lasts the life of the vehicle without maintenance. While modern fluids are more robust, they still degrade over time and mileage due to heat and wear particles. For your 2017 Kia Sorento EX at 85,000 miles, experiencing rough shifting is a strong indicator that a transmission fluid change is warranted.

Here's what you should consider:

  1. Causes of Rough Shifting:

    • Degraded transmission fluid (most likely).
    • Low fluid level.
    • Clogged transmission filter.
    • Worn transmission components (less likely at this mileage without other symptoms).

  2. DIY vs. Professional:

    • DIY: A simple drain and fill can be done by a competent DIYer. You'll need the correct Kia-specific ATF (often SP-IV or SP-IVM, check your owner's manual) and a new crush washer for the drain plug. Be aware that a drain and fill only replaces a portion of the fluid, not all of it. Multiple drain and fills over a few hundred miles can gradually replace more fluid.
    • Professional: A shop can perform a more thorough fluid exchange (not a 'flush' which can sometimes dislodge debris) that replaces a higher percentage of the old fluid. They can also inspect for leaks and check the filter.

  3. Steps for a DIY Drain & Fill (General):

    • Ensure the vehicle is level and cool.
    • Locate the transmission drain plug (usually on the bottom of the pan).
    • Place a drain pan underneath and remove the plug.
    • Allow all fluid to drain.
    • Replace the crush washer and reinstall the drain plug, torquing to spec.
    • Locate the fill plug (often on the side or top of the transmission, sometimes accessed from the engine bay).
    • Using a pump, add the specified amount and type of new ATF. Consult your owner's manual for capacity.
    • Start the engine, cycle through gears, and check the fluid level according to your manual's procedure (often with the engine warm and running).

  4. When to See a Shop:

    • If the rough shifting persists after a fluid change.
    • If you notice any leaks.
    • If you're uncomfortable with the DIY process or don't have the right tools.
    • If the owner's manual specifies a more complex procedure for checking/filling fluid (some newer transmissions lack a traditional dipstick).

Always use the exact fluid type specified in your Kia owner's manual to avoid potential transmission damage.

Menu

Help & account