Unspace

Transwarp is the general name for the technology that the spacecraft in the Beast Wars use to power their flights through space and time. A transwarp engine, like those aboard the Maximal's Axalon and the Predacon's Darksyde, runs on transwarp cells. Each engine uses a number of smaller cells. The cells can also be removed and used individually on smaller craft such as shuttles and stasis pods.

Each transwarp engine also generates its own transwarp signature that can be used to track its movements or pin down its current location.

From Teletraan I: The Transformers Wiki, a Wikia wiki.