Quantum rebuilds gearboxes and diff’s only to the highest possible standard. We don’t just build them “by the numbers.” We fit the pattern on each individual gearbox. Send us your unit and we can have your job turned around very quickly. Many improvements are available such as ring gear lightening and full REM treatment. We are also a dealer on replacement parts and gears. 

Bell housings: If you are rebuilding your Van Diemen gearbox, then you will want to have us re-seal your bell housing. We have all of the appropriate seals in inventory to prevent engine oil leaks, and can also convert older cars to modern oil tube assemblies. Also, we can repair cracks and stripped holes.

Quantum builds a wide variety of racing engines including Ford 1.6 and 2.0L, air-cooled Porsche, push-rod, overhead cam, 4 cyl and V-8’s. Our understanding of engines and current technology allows us to build them to the highest specification that the rules allow. We know what improvements to make for maximum power, while still maintaining reliability. Our Porsche motors are the absolute best per cc in the country. We have decades of experience with our Stuska engine dyno and Superflow flow bench. We work with a number of suppliers including J&E, CP, Elgin, Isky, Crane, Carillo, Xceldyne, Crower and CV to provide you with the most hp.

If you have a killer 2.0L iron head with a broken center cam tower, then you should consider having us repair it for you. We have engineered a very strong, precision fix. This is a cheaper way to go than having a new head ported.