Gearbox Mitsubishi F4A22

The 4-speed automatic transmission Mitsubishi F4A22 or under the old name KM175 was produced by the company from 1987 to 2001 and was installed on Lancer, Colt, Galant or Space Runner. Based on this transmission, Hyundai automatic transmissions were created under the indexes A4BF1, A4BF2 and A4BF3.

This series includes: F4A21, F4A22, F4A23, F4A33, F4A41, F4A42, F4A51, W4A32, F5A51.

Specifications

Production years 1987 – 2001
Type automatic transmission
Number of gears 4
Type of drive front
Engine volume, l up to 2.0
Torque output, Nm up to 180
Recommended oil Mitsubishi ATF SP III
Oil capacity, liter 6.3
Replacing the oil every 80,000 km
Replacing the filter every 160,000 km
Gearbox lifespan, km ~330 000

Gear ratios Mitsubishi F4A22

Using the example of a Mitsubishi Space Runner 1993 with a 1.8 liter engine:

Main 4.350
1st 2.846
2nd 1.581
3rd 1.000
4th 0.685
Reverse 2.176

The transmission was installed on:

  • Hyundai Lantra 1 (J1) in 1990 – 1995; Lantra 2 (RD) in 1995 – 1998;
  • Hyundai Sonata 2 (Y2) in 1988 – 1993; Sonata 3 (Y3) in 1993 – 1998;
  • Mitsubishi Colt 4 (CA) in 1991 – 1996;
  • Mitsubishi Eclipse 1 (D2) in 1989 – 1994;
  • Mitsubishi Galant 6 (E3) in 1987 – 1994; Galant 7 (E5) in 1992 – 1998;
  • Mitsubishi Lancer 6 (C6) in 1988 – 1991; Lancer 7 (CB) in 1991 – 2001;
  • Mitsubishi Space Runner 1 (N1) in 1991 – 1999;
  • Mitsubishi Space Wagon 2 (UF) in 1991 – 1998.

Disadvantages of the Mitsubishi F4A22 gearbox

  • This automatic transmission has no design weaknesses, all its problems are purely age-related.
  • The gearbox is destroyed by a drop in lubricant pressure due to wear of the bushings and leaks in the oil seals.
  • Weak pressure reduces the life of the clutch packs and the first to burn are C1 and C2​​​​​​​​​​​​.
  • The brake band, freewheel and solenoid wiring are also often replaced.
  • Rarely, destruction of the planetary bearing and differential occurs.

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