The Hyundai A6LF2 6-speed automatic transmission was assembled in Korea from 2009 to 2020 and was installed with powerful Lambda V6 engines, as well as the 2.0-liter D4HA diesel engine. In many markets, this transmission is primarily known from the Hyundai Tucson and Kia Sportage crossovers.
A6 family: A6GF1, A6MF1, A6MF2, A6LF1, A6LF2, A6LF3.
In 2009, a new line of 6-speed Hyundai automatic transmissions was introduced, including the A6LF2. It was installed with the 2.0-liter G4KH turbo engine, the 2.0-liter D4HA diesel engine, and V6 units. It is a conventional hydromechanical automatic transmission for transversely mounted engines, with a torque converter, three planetary gear sets, brake clutches and couplings, a freewheel, a parachoidal oil pump, and a valve body with 8 solenoids.
This automatic transmission has been upgraded several times, and while the A6LF2-1 version produced 350 Nm of torque, the newer A6LF2-2 modification was compatible with engines producing up to 400 Nm of torque.
Specifications
| Type | automatic transmission |
| Number of gears | 6 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 3.8 |
| Torque output, Nm | up to 400 |
| Recommended oil | Hyundai ATF SP-IV |
| Oil capacity, liter | 7.8 |
| Partial replacement, liter | 4.5 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~270 000 km |
Gear ratios Hyundai-Kia A6LF2
Using the example of a 2016 Kia Sportage with a 2.0-liter diesel engine:
| Main | 3.195 |
| 1st | 4.651 |
| 2nd | 2.831 |
| 3rd | 1.842 |
| 4th | 1.386 |
| 5th | 1.000 |
| 6th | 0.772 |
| Reverse | 3.393 |
Using
The transmission was installed on:
- Hyundai Grandeur 4 (TG) in 2009 – 2011; Grandeur 5 (HG) in 2011 – 2016; Grandeur 6 (IG) in 2016 – 2019;
- Hyundai Grand Santa Fe 1 (NC) in 2013 – 2020;
- Hyundai Santa Fe 2 (CM) in 2009 – 2012; Santa Fe 3 (DM) in 2012 – 2018;
- Hyundai Sonata 6 (YF) in 2010 – 2015; Sonata 7 (LF) in 2014 – 2020;
- Hyundai ix35 1 (LM) in 2010 – 2015;
- Hyundai Tucson 3 (TL) in 2015 – 2018;
- Kia Cadenza 1 (VG) in 2009 – 2016; Cadenza 2 (YG) in 2016 – 2019;
- Kia Carnival 2 (VQ) in 2010 – 2014; Carnival 3 (YP) in 2014 – 2020;
- Kia Optima 3 (TF) in 2010 – 2015; Optima 4 (JF) in 2015 – 2020;
- Kia Sorento 2 (XM) in 2009 – 2014; Sorento 3 (UM) in 2014 – 2018;
- Kia Sportage 3 (SL) in 2010 – 2016; Sportage 4 (QL) in 2015 – 2018;
- Kia Opirus 1 (GH) in 2009 – 2011;
- Dongfeng (как 6F36) ix7 I (F517) in 2019 – …
Disadvantages of the Hyundai-Kia A6LF2 gearbox
- In the early years of production, the manufacturer struggled with jerking during gear shifts, with new firmware updates released regularly until this problem was finally resolved. The oil pump of the first version also relied on a bushing, which would spin when overheated.
- A common problem with this series of transmissions is loosening of the center pinion bolts, which results in severe distortion and rapid wear of the Underdrive clutch pack. Further damage to the transmission will continue until it finally seizes.
- Another common problem with this automatic transmission is differential creaking, which occurs due to stripping of the differential housing splines. This transmission is not designed for use in severe conditions and simply cannot tolerate regular slippage.
- The torque converter lockup clutches wear out very quickly, and dirt from them immediately ends up in the automatic transmission’s valve body, clogging its channels and solenoids. The appearance of jerking noises during gear shifts indicates the need for a transmission fluid change.
- Electrical issues can be a significant problem: the solenoid wiring harness often burns out, and the temperature sensor and input/output speed sensor fail due to heavy contamination.
