Pascal found swarf in intricate oil cooling channels of Mark McCann's Bugatti Veyron gearbox, but no obvious damage to gears.

Mark McCann's Bugatti Veyron has a broken gearbox, rendering it inoperable.

Mark McCann was scammed out of a £3,500 deposit when attempting to buy a secondhand gearbox for his Bugatti Veyron.

Mark McCann bought a Bugatti Veyron for £900,000.

Mark McCann is seeking help from viewers to find a test rig with a filtration system that can handle 6,500 RPM, change gears, and work the clutch for his Bugatti Veyron.

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.