Rear axle gear ratio 4:75

Irmscher legendary rear axle ratio

rear axle ratio 4:75
which can be fitted to all Opel rear-wheel drive cars of the 70/80s and large rear axle (not Ascona / Manta 400 / Commodore B).

The faster propulsion of the vehicle is immediately noticeable by the changed, shorter gear ratio.

This rear axle transmission ratio was very successful in Opel Irmscher vehicles, among others in the rounds of the European Rally Championship in 1973 and 1974.
The Opel/Irmscher Ascona A, for example, was piloted by rally legend Walter Röhrl, who also won the championship.
Drivers such as Sepp Haider in the Opel/Irmscher Kadett C or Jochi Kleint in the Opel/Irmscher Ascona B, as well as many customer teams, achieved numerous successes.

These newly developed parts were subjected to extensive testing and further development tests in various engine events.

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