A dragging clutch can cause the Bugatti Veyron's control unit to fail to engage reverse gear after three attempts.

The only way to properly bed in the Bugatti Veyron clutch and flush out fibers is to run it on a spin test stand with sacrificial filters.

Bugatti's brief for the Veyron gearbox included achieving fast acceleration, high top speed, and ultra-smooth gear shifts using a dual-clutch transmission.

The initial problem with Mark McCann's Bugatti Veyron gearbox is theorized to have started when a garage drilled out a rounded sump plug, introducing debris.