Gearbox Mitsubishi F5A51

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.

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