Kia Shares More Than a Parent Company With Hyundai — Expert Kia transmission service since 1987. All models, all years. Free diagnostic.
Kia uses the same transmissions as Hyundai — the A6MF1, 6DCT, and A8LF1 are shared platforms. Kia's Stinger and Telluride use the same 8-speed automatic as Genesis models. The Sorento and Optima owners encounter the same A6MF1 solenoid failures as Sonata owners.
Kia and Hyundai repairs are interchangeable at our shop — same parts, same procedures, same experience.
Years to watch: 2010–2016 Optima and Sorento with A6MF1 (solenoid failures); 2014–2019 Soul and Sportage with 6DCT (dry clutch judder); 2018+ Stinger with A8LF1 (early solenoid wear).
Our technicians know these failure modes by heart — we rebuild and repair them every week.
Transmission: A6MF1
Same A6MF1 failure as Hyundai Sonata — shift solenoid A/B fail around 80–100k miles in Optima and Sorento.
Symptoms: Harsh delayed upshifts, P0750/P0760 codes, slipping between gears, hesitation from stop
Transmission: 6DCT
Kia Soul and Sportage 6DCT shares the dry dual clutch shudder issue with Hyundai's 7DCT. Low-speed engagement is harsh and jerky.
Symptoms: Jerking when pulling away from stop, shuddering at low speed, hesitation from complete stop
Transmission: A8LF1
Kia Stinger and K900 with the 8-speed A8LF1 develop solenoid issues similar to the ZF 8HP in European cars. Harsh shifts and check engine codes around 60–100k miles.
Symptoms: Harsh 1-2 upshift when cold, clunking into Drive from Park, P07xx codes, hunting between gears at highway speed
Transmission: Telluride
2020+ Telluride and Sorento with 8-speed develop TCC shudder — same light-throttle highway vibration as other modern 8-speeds.
Symptoms: Vibration at 40–65 mph under light throttle, disappears under acceleration, more noticeable when warm
A6MF1 solenoid: $400–650 | A6MF1 rebuild: $1,500–2,000 | 6DCT clutch service: $400–650 | 8-speed solenoid: $450–700 | 8-speed rebuild: $1,800–2,400. Call for exact quote on your specific vehicle.
All prices include Chicago market labor rates ($125–145/hr). Call for exact quote on your specific vehicle and year.
Start with Free Diagnostic →"Honest diagnosis, fair price, and the repair was done right. Chicago Transmission has been my go-to for years. Wouldn't trust anyone else with my car."
"The free diagnostic alone was worth the trip. They found the problem fast, gave me a written estimate, and completed the work on time. Exceptional service."
"Family owned and it shows. They treated my car like it was their own. The lifetime warranty on my rebuild gives me total peace of mind. Highly recommend."
Identical. Same transmission, same parts, same process. Our pricing is the same for both.
Software update first ($0–150 at dealer if under warranty). If shudder continues, clutch pack service is $400–650. Often improves significantly.
The A8LF1 in the Stinger handles the power fine but benefits from more frequent fluid changes (every 30k vs. 40k) due to the higher operating temperatures from spirited driving.
2–3 business days. We stock Kia-spec friction kits.
Yes. The Telluride 8-speed is the A8LF1 — we rebuild it and stock updated solenoid packs.
Free computer diagnostic included with any Kia transmission inspection. Same-day appointments available at our Lincoln Park shop.
