Transmission Rebuilding

Our standard gearbox rebuilding includes complete disassembly, thorough cleaning, and close inspection of all parts. We replace the synchro rings, bearings, seals and gaskets with original BMW parts. Other worn parts are replaced as needed at additional cost. The transmission is blueprinted, shimmed torqued and pre-loaded precisely to BMW specifications using the correct BMW special tools for each task.

We have read that BMW gearboxes have inherent weaknesses in bearings and synchros. In over 33 years of experience with BMW gearboxes, we can not agree with that opinion. We typically race all season with the same stock BMW gearbox and usually only change the synchros during between season winter rebuilds. We race more than a season on the bearings some claim are weak, and with engines double the original horsepower!

Korman offers rebuilds warranted for 2 years/24,000 miles for all BMW transmissions, from the old BMW Porsche-type synchronizer gearboxes to the newest M3. And, you'll be surprised how much you can save over a factory reman unit!

Korman recommends Redline Synthetic Lubricants for your BMW's drivetrain