The F28 6-speed manual transmission was produced at the German Getrag plant from 1992 to 1996 and was installed exclusively in all-wheel drive Opel Calibra and Vectra models with the 2.0-liter C20LET turbo engine. This manual transmission is widely used for swaps on other models.
Specifications
| Type | manual transmission |
| Number of gears | 6 |
| Type of drive | all wheel |
| Engine volume, l | up to 2.0 |
| Torque output, Nm | up to 280 |
| Recommended oil | API GL-4, SAE 75W-85 |
| Oil capacity, liter | 2.0 |
| Replacing the oil | every 50 000 km |
| Replacing the filter | every 50 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 55 |
Gear ratios Opel F28
Using the example of a 1995 Opel Calibra with a 2.0 turbo engine:
| Main | 3.72/3.70 |
| 1st | 3.57 |
| 2nd | 2.16 |
| 3rd | 1.45 |
| 4th | 1.10 |
| 5th | 0.89 |
| 6th | 0.74 |
| Reverse | 3.32 |
Using
The transmission was installed on:
- Opel Calibra A (C89) in 1992 – 1996
- Opel Vectra A (J89) in 1992 – 1994
Disadvantages of the Opel F28 gearbox
- This is a very reliable manual transmission, but its service life is highly dependent on operating conditions;
- A weak point of this manual transmission is leaks through the gearshift lever shaft seal;
- The lever also sticks due to critical wear of the plastic sleeve and the gearshift sleeve;
- Forums also complain about the gear selector mechanism quickly becoming loose;
- At high mileage, bearings may begin to hum, most often on the transmission input shaft.
