The Aisin AW50-40LE 4-speed automatic transmission was produced at a plant in Japan from 1988 to 2009 and was installed in popular models such as the Suzuki SX4, Daewoo Espero, Kia Clarus, and Carnival. This transmission is also known in Opel vehicles as the AF20 or AF22, and in Saab vehicles as the FA44 or FA46.
Specifications
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 2.6 |
| Torque output, Nm | up to 250 |
| Recommended oil | ATF Dexron III since 2000 Toyota ATF Type T-IV since 2006 Toyota ATF WS |
| Oil capacity, liter | 7.2 |
| Partial replacement, liter | 3.5 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 77 |
Gear ratios Aisin AW50-40LE
Using the example of a 2008 Suzuki SX4 with a 2.0 liter engine:
| Main | 4.38 |
| 1st | 2.875 |
| 2nd | 1.568 |
| 3rd | 1.000 |
| 4th | 0.697 |
| Reverse | 2.300 |
Using
The transmission was installed on:
- Daewoo Espero 1 (K100) in 1991 – 1999
- Daewoo Leganza 1 (V100) in 1999 – 2002
- Kia Carnival 1 (GQ) in 1998 – 2005
- Kia Clarus 1 (FE) in 1995 – 2001
- Opel Astra F (T92) in 1992 – 1995
- Opel Calibra A (C89) in 1990 – 1995
- Opel Vectra A (J89) in 1988 – 1995
- Saab 900 II (NG) in 1994 – 1998
- Saab 9000 I (YS3C) in 1994 – 1998
- Saab 9-3 I (YS3D) in 1998 – 2003
- Saab 9-5 I (YS3E) in 1997 – 2001
- Suzuki Aerio 1 (ER) in 2001 – 2007
- Suzuki SX4 1 (GY) in 2006 – 2009
Disadvantages of the Aisin AW50-40LE gearbox
- This is a fairly reliable automatic transmission, but its service life is highly dependent on the engine;
- With weak engines up to 2.0 liters, the transmission easily lasts up to 250,000-300,000 km;
- However, with powerful engines, the torque converter lockup clutch wears out quickly;
- Then wear debris clogs the valve body, causing noticeable jolts;
- And if left unattended, the oil pump bushing will break, leading to leaks;
- Cracks in the Forward-Direct drum and brake band separation are also common.
