The F4A4x series are a series of 4-speed automatic transaxles used by Mitsubishi in a variety of vehicles. They are used in vehicles where the engine mounts on the left hand side.
All use a 3-element, single stage, two phase torque converter. Gear ratios are the same in all of the F4A4x, with the final drive ratio being modified for each application.
Compared to earlier Mitsubishi automatic transaxles, the F4A4x:
- Uses a two shaft design instead of three to reduce weight
- Uses metal plates
- Deletes the one-way clutch
- Uses an external oil filter
- Increases oil cooler feed tubes to two, instead of one
Technical Specifications (Common)
|Lubricant||Mitsubishi ELC-4 ATF, SPII, Castrol TQM-SP, Valvoline Type M-II Special|
The F4A41 saw service behind the 4G92, 4G93, 4G13 and 4G15. All variants use a final drive ratio of 4.042, with the exception of the F4A41-1-U8A2 which was used in the Eurpoean Mitsubishi Charisma and used a final drive of 4.407. This transmission uses 3 clutch discs for underdrive, 3 for overdrive and 2 for reverse. It uses 4 low-reverse brake discs and 2 second brake discs.
The F4A42-1 saw service behind the 4G93, 4G63, 4G64 and 6A12. It was similar to the F4A41, except that it added a clutch disc for both underdrive and overdrive (making 4 each), added a low-reverse brake disc and second brake disc, bringing the totals to 5 and 3 respectively.
Final Drive Ratios
|F4A42-1-E8A||Carisma (4G93 with GDI)||3.770|
|F4A42-1-U5A1||RVR (4G93 with GDI)||4.407|
The F4A42-2 was used with the 4G64 and 6A13 engines. When used with the 4G64 it had a final drive of 4.042 and 3.770 with the 6A13. The only difference between this model transaxle and the F4A42-1 is that it uses four second brake discs instead of three.