The General Motors AF50 8-speed automatic transmission has been produced at the Japanese plant since 2016 and is installed in front- and all-wheel-drive General Motors models such as the Opel Insignia and Buick Regal. This automatic transmission is essentially a variant of the popular Aisin TG-81SC.
Specifications
| Type | automatic transmission |
| Number of gears | 8 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 3.6 |
| Torque output, Nm | up to 480 |
| Recommended oil | Aisin AW-2 |
| Oil capacity, liter | 7.2 |
| Partial replacement, liter | 3.5 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 95 |
Gear ratios GM AF50
Using the 2019 Opel Insignia with a 2.0 CDTi diesel as an example:
| Main | 3.075 |
| 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:
- Buick Regal 6 (E2XX) in 2017 – …;
- Buick LaCrosse 3 (P2XX) in 2016 – 2017;
- Cadillac XT5 I (C1UL) in 2016 – 2019;
- Chevrolet Malibu 9 (V400) in 2016 – 2017;
- Opel Insignia B (Z18) in 2017 – …
Disadvantages of the GM AF50 gearbox
- This is a fairly reliable automatic transmission, but only if you maintain its cooling system;
- The small heat exchanger becomes clogged by 100,000 km, and the automatic transmission begins to overheat;
- High temperatures reduce the lifespan of the Teflon rings, and the lubrication pressure drops;
- Then, due to low oil pressure in the system, the clutch packs simply burn out;
- Also, the valve body solenoids quickly become contaminated with wear debris from the clutches.
