The 4-speed automatic transmission Aisin 31-80LE was produced at a Japanese company from 1993 to 2007 and was installed on all-wheel drive versions of Toyota Progres, Cresta, Mark II and Crown under the symbol A340H. A reinforced modification of this automatic transmission for V8 engines is known under the symbol AW31-81LE and A341H.
AW30 family: AW30‑40LE, AW30‑40LS, AW30‑41LS, AW30‑43LE, AW31‑80LE.
Specifications
| Production years | 1993 – 2007 |
| Type | automatic transmission |
| Number of gears | 4 |
| Type of drive | all wheel |
| Engine volume, l | up to 3.0 |
| Torque output, Nm | up to 300 |
| Recommended oil | Toyota ATF Type T-IV |
| Oil capacity, liter | 8.3 |
| Replacing the oil | every 60,000 km |
| Replacing the filter | every 60,000 km |
| Gearbox lifespan, km | ~400 000 |
| Weight, kg | 79 |
Gear ratios Aisin AW31-80LE
Using the example of a Toyota Progres 2003 with a 2.5 liter engine:
| Main | 4.3 |
| 1st | 2.804 |
| 2nd | 1.531 |
| 3rd | 1.000 |
| 4th | 0.705 |
| Reverse | 2.393 |
The transmission was installed on:
- Toyota Altezza 1 (XE10) in 2000 – 2005;
- Toyota Brevis 1 (G10) in 2001 – 2007;
- Toyota Chaser 5 (X90) in 1993 – 1996; Chaser 6 (X100) in 1996 – 2001;
- Toyota Cresta 4 (X90) in 1993 – 1996; Cresta 5 (X100) in 1996 – 2001;
- Toyota Crown 10 (S150) in 1995 – 2001; Crown 11 (S170) in 1999 – 2003;
- Toyota Mark II 7 (X90) in 1993 – 1996; Mark II 8 (X100) in 1996 – 2000; Mark II 9 (X110) in 2000 – 2004;
- Toyota Mark II Blit 1 (X110) in 2002 – 2007;
- Toyota Progres 1 (G10) in 1998 – 2007;
- Toyota Verossa 1 (X110) in 2001 – 2004.
Disadvantages of the AW31-80LE gearbox
- This is a completely reliable automatic transmission, but it is installed on charged modifications of models;
- Therefore, with excessively active use, the torque converter clutch quickly wears out;
- And then the valve body becomes clogged with this dirt and shocks appear when switching;
- If you drive without paying attention to the shocks, you will break the oil pump bushing;
- Then lubricant leaks will begin, and the planetary mechanism is afraid of low oil levels.
