The 4-speed automatic transmission Mitsubishi F4A23 or under the old name KM177 was produced from 1991 to 1998 and was installed on such models as the Eclipse, Galant and Space Wagon. This transmission was intended for front-wheel drive cars with an engine up to 2.4 liters and 200 Nm.
This series includes: F4A21, F4A22, F4A23, F4A33, F4A41, F4A42, F4A51, W4A32, F5A51.
Specifications
| Production years | 1991 – 1998 |
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | front |
| Engine volume, l | up to 2.4 |
| Torque output, Nm | up to 200 |
| 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 | ~350 000 |
Gear ratios Mitsubishi F4A23
Using the example of a Mitsubishi Space Wagon 1995 with a 2.4 liter engine:
| Main | 3.900 |
| 1st | 2.551 |
| 2nd | 1.488 |
| 3rd | 1.000 |
| 4th | 0.685 |
| Reverse | 2.176 |
The transmission was installed on:
- Mitsubishi Eclipse 2 (D3) in 1994 – 1999;
- Mitsubishi Galant 7 (E5) in 1992 – 1998;
- Mitsubishi Space Wagon 2 (UF) in 1991 – 1998.
Disadvantages of the Mitsubishi F4A23 gearbox
- This automatic transmission does not have any design weaknesses and all the problems are purely age-related.
- The automatic transmission is destroyed by a drop in oil pressure due to wear of the bushings and leaks in the oil seals.
- Due to weak pressure, the service life of the clutch packs, and especially C1 and C2, decreases.
- The freewheel, brake band or solenoid wiring are often replaced.
- Sometimes there is destruction of the differential and planetary gear bearings.
