The 8-speed automatic transmission Aisin TG-81SD or AWF8G55 has been produced since 2015 and is installed on the most powerful Volvo models, including hybrid modifications T8 TwinEngine. Such a transmission holds the total torque of the classic internal combustion engine and electric motor up to 650 Nm.
Specifications
| Production years | since 2015 |
| Type | automatic transmission |
| Number of gears | 8 |
| Type of drive | all wheel |
| Engine volume, l | up to 2.0 |
| Torque output, Nm | up to 650 |
| Recommended oil | Toyota ATF WS |
| Oil capacity, liter | 7.0 |
| Partial replacement, liter | 4.0 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~300 000 |
| Weight, kg | 98 |
Gear ratios Aisin TG-81SD
Using the example of a Volvo XC90 T8 2020 with a 2.0 liter engine:
| Main | 3.329 |
| 1st | 5.250 |
| 2nd | 3.029 |
| 3rd | 1.950 |
| 4th | 1.457 |
| 5th | 1.221 |
| 6th | 1.000 |
| 7th | 0.809 |
| 8th | 0.673 |
| Reverse | 4.015 |
Using
The transmission was installed on:
- Volvo S60 III (224), S90 II (234), V60 II (225), V90 2, XC60 II (246), XC90 II (256).
Disadvantages of the Aisin TG-81SD gearbox
- This is a reliable hydromechanical automatic transmission, but it is very sensitive to oil purity.
- The gearbox hydraulic unit quickly becomes clogged with wear products from the torque converter lock-up clutch.
- The remaining problems with the automatic transmission are related to overheating, the heat exchanger is clearly too small here.
- Plastic and Teflon parts of the transmission quickly wear out from high temperatures.
- Then the lubrication pressure in the system decreases and the clutches in the packs begin to burn.
