Troublesome Trucks (Foolish Freight Cars or simply Cars in the US) are so nicknamed because they can be quite troublesome and love to play tricks on the engines, except Edward, Stepney, Hiro, and Salty. The trucks have been the cause of most of the railway's accidents. However, since Douglas smashed the spiteful brake van and Oliver pulled S.C. Ruffey, their leader, apart, they have been frightened of some engines.
- Season 1 - Percy's Oil Spill, Harvey's Goods Train, Sir Handel and the Coal Mines, Big Strong Murdoch, and Bill and Ben
- Season 2 - Unique Engines (flashback; cameo), Fire at Ffarquhar, Trouble with Brake Vans, and The Return of Boulder
- The Great Storm of Sodor (mentioned)
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