The Opel R28 5-speed manual transmission was produced by the company from 1989 to 2001 and was installed in rear-wheel drive Omega and Senator models paired with C30SE and X30XE engines. This transmission was designed for V6 gasoline engines with torque up to 280 Nm.
Specifications
| Type | manual transmission |
| Number of gears | 5 |
| Type of drive | rear |
| Engine volume, l | up to 3.0 |
| Torque output, Nm | up to 280 |
| Recommended oil | API GL-4, SAE 75W-80 |
| Oil capacity, liter | 1.9 about 1.2 liters are required for replacement |
| Replacing the oil | every 60 000 km |
| Replacing the filter | every 60 000 km |
| Gearbox lifespan, km | ~300 000 km |
| Weight, kg | 68 |
Gear ratios Opel R28
Using the example of a 1991 Opel Senator with a 3.0 liter engine:
| Main | 3.7 |
| 1st | 3.807 |
| 2nd | 2.106 |
| 3rd | 1.335 |
| 4th | 1.000 |
| 5th | 0.814 |
| Reverse | 3.402 |
Using
The transmission was installed on:
- Opel Omega A (V87) in 1989 – 1994;
- Opel Omega B (V94) in 1994 – 2001;
- Opel Senator B (V88) in 1989 – 1993.
Disadvantages of the Opel R28 gearbox
- This is a very reliable manual transmission, and problems only occur at high mileage;
- The most common complaint is a loose gearshift lever, which breaks the plastic ring and bushings;
- Transmissions of this series also often leak oil through the gearshift seals;
- After 200,000 km, the input shaft bearing may start humming and require replacement;
- Overly active owners will also have to replace the first-gear synchronizers.
