What is tandem?

tandem master cylinder

Glossary “tandem master cylinder” Definition:
Master cylinder that consists of a single bore with two pistons and separate fluid compression chambers used with “split” braking systems to ensure that there will be some braking power in one braking circuit, even if there is a fluid loss in the other.

tandem axle drive

Glossary “tandem axle drive” Definition:
Type of drive that combines two single axles through the use of an interaxle differential or power divider and a short shaft that connects the two.