The 5-speed automatic transmission GM AF33 was produced in Japan from 2001 to 2010 and existed in two versions: for a crossover such as the Opel Antara based on the Aisin AW55-51LE, as well as for a number of passenger car models based on the Aisin AW55-50SN.
Specifications
| Type | automatic transmission |
| Number of gears | 5 |
| Type of drive | front / all wheel |
| Engine volume, l | up to 3.2 |
| Torque output, Nm | up to 370 |
| Recommended oil | Toyota ATF Type T-IV since 2006 Toyota ATF WS |
| Oil capacity, liter | 7.2 |
| Partial replacement, liter | 3.5 |
| Maintenance | every 60 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 90 |
Gear ratios GM AF33
Using the example of a 2008 Opel Antara with a 3.2 liter engine:
| Main | 2.70 |
| 1st | 4.575 |
| 2nd | 2.979 |
| 3rd | 1.947 |
| 4th | 1.318 |
| 5th | 1.000 |
| Reverse | 5.024 |
Using
The transmission was installed on:
- Chevrolet Captiva 1 (C100) in 2006 – 2011;
- Chevrolet Epica 1 (V250) in 2006 – 2008;
- Chevrolet Equinox 1 (GMT191) in 2004 – 2009;
- Opel Antara A (L07) in 2006 – 2010;
- Opel Signum A (Z03) in 2003 – 2005;
- Opel Vectra C (Z02) in 2002 – 2005;
- Pontiac Torrent 1 (GMT191) in 2005 – 2009;
- Saturn Ion 1 (GMX357) in 2002 – 2004;
- Saturn Vue 1 (GMT315) in 2001 – 2003.
Disadvantages of the GM AF33 gearbox
- Automatic transmissions prior to 2004 often failed due to antifreeze getting into the oil;
- The first automatic transmissions also suffered from a short valve body lifespan, but this was later corrected;
- And so the transmission lasts until the valve body becomes clogged with wear debris from the torque converter clutch;
- If you ignore the shocks and vibrations, the oil pump bushing will break;
- With excessively aggressive driving, the rear planetary gear set can break;
- On all-wheel drive models, the front bearing also breaks its seat;
- Weak points of the transmission also include short-lived bushings and brake bands.
