The Mitsubishi F5A51 5-speed automatic transmission was produced from 1997 to 2012 and was installed on models such as the Galant and Diamante, including the all-wheel drive version of the W5A51. This gearbox, also known as F5A5A, served as the basis for the Hyundai A5GF1 and A5HF1 automatic transmissions.
This series includes: F4A21, F4A22, F4A23, F4A33, F4A41, F4A42, F4A51, W4A32, F5A51.
Specifications
| Production years | 1997 – 2012 |
| Type | automatic transmission |
| Number of gears | 5 |
| Type of drive | front |
| Engine volume, l | up to 3.8 |
| Torque output, Nm | up to 400 |
| Recommended oil | Mitsubishi ATF SP III |
| Oil capacity, liter | 8.5 |
| Replacing the oil | every 80,000 km |
| Replacing the filter | every 160,000 km |
| Gearbox lifespan, km | ~200 000 |
Gear ratios Mitsubishi F5A51
Using the example of a Mitsubishi Diamante 2003 with a 3.0 liter engine:
| Main | 3.684 |
| 1st | 3.789 |
| 2nd | 2.057 |
| 3rd | 1.421 |
| 4th | 1.000 |
| 5th | 0.731 |
| Reverse | 3.865 |
The transmission was installed on:
- Mitsubishi Airtrek 1 (CU) in 2002 – 2008;
- Mitsubishi Diamante 2 (F3) in 2002 – 2005;
- Mitsubishi Eclipse 4 (DK) in 2005 – 2011;
- Mitsubishi FTO 1 (DE) in 1997 – 2000;
- Mitsubishi Galant 8 (EA) in 1998 – 2006; Galant 9 (DJ) in 2003 – 2012;
- Mitsubishi Lancer Evolution 7 (CT) in 2001 – 2003; Lancer Evolution 9 (CT) in 2005 – 2007;
- Hyundai Grandeur 3 (XG) in 2002 – 2005;
- Hyundai Equus 1 (LZ) in 1999 – 2003;
- Kia Carnival 1 (GQ) in 2001 – 2005;
- Kia Opirus 1 (GH) in 2003 – 2005.
Disadvantages of the Mitsubishi F5A51 gearbox
- This is a reliable automatic transmission, but it is combined with very powerful power units.
- The first versions of the automatic transmission had a weak wave spring, which often burst.
- A sharp start and slipping greatly reduce the life of planetary gear bearings.
- During active use, the bushings move little and vibrations destroy the oil pump.
- Regularly update the gearbox oil or wear products will quickly clog the valve body.
