Hyundai/Kia A6GF 6-Speed Automatic Transaxle (FWD) · Hyundai / Kia · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2009–2020 Hyundai Sonata (2.4L/2.0T), 2009–2020 Kia Optima (2.4L/2.0T), 2010–2020 Hyundai Tucson (2.0L FWD), 2010–2020 Kia Sportage (2.0L FWD)
| Configuration | 6-speed automatic FWD transaxle |
|---|---|
| Gear Ratios | 1st 3.98:1 · 2nd 2.09:1 · 3rd 1.33:1 · 4th 0.98:1 · 5th 0.79:1 · 6th 0.63:1 · Rev 2.91:1 |
| Fluid Type | Hyundai/Kia SP-IV-M ATF |
| Fluid Capacity | 7.6 qts total, 3.6 qts service refill |
The A6GF1 solenoid regulator valve wears, causing inconsistent line pressure and shift quality issues across all gear ranges.
Symptoms: Variable shift firmness, DTC P0777 or P0778, transmission hunting between gears on hills
TCC shudder is very common on Sonata and Optima 2.4L and 2.0T applications. Resolved with SP-IV-M flush in early stages.
Symptoms: Vibration at 35–55 mph, DTC P0740, shudder reduces with fresh fluid
Turbocharged 2.0T applications accelerate clutch pack wear compared to 2.4L naturally aspirated units.
Symptoms: Slip under hard acceleration, DTC P0732–P0737, RPM flare
A6GF rebuild replaces solenoid regulator valve, all clutch packs (upgraded for 2.0T), torque converter, and all seals. SP-IV-M ATF used.
Hyundai/Kia SP-IV-M ATF every 30,000 miles. TCC shudder on Sonata is often resolved with a fluid flush — do this before authorizing a rebuild when shudder is the only symptom.
Hyundai Sonata, Kia Optima, Hyundai Tucson FWD, and Kia Sportage FWD from 2009–2020 with 6-speed automatic.
TCC shudder from the A6GF is the most common Sonata automatic complaint. A fresh SP-IV-M flush resolves many cases before a rebuild is needed.
A full rebuild ranges $1,600–$2,100 at Chicago Transmission.
Hyundai/Kia SP-IV-M ATF.
Yes — it's a solid unit when SP-IV-M fluid is changed every 30,000 miles.
Free diagnostic, written estimate, lifetime warranty. Chicago's A6GF1/2 rebuild specialists since 1987.
