Gray Troublesome Trucks as their names simply are gray troublesome trucks who are usually pulled in trains with the other troublesome trucks.
- Season 2: Twin Trouble (one only; cameo)
- Season 11: Fergus' Day Off (do not speak) and Stepney and the Bluebell Branchline
- Season 15: The Crosby Coalition
They also appeared in a discussion.
- Keekre24 (Thomaswoodenrailway) has nine models of the gray troublesome trucks.