When Diesel failed to shunt a rake of old trucks, some of these vans were seen singing a rude parody of "Pop Goes the Weasel" called Pop Goes the Diesel, much to Diesel's annoyance.
These vans (along with other Troublesome Trucks) tricked Bill and Ben where to shunt them. As a result, the yard was in a terrible mess causing the twins to be late with their evening duties.
When Oliver fell into the turntable well, they were one of several trucks who teased him when returned from the works. They stopped their teasing towards him, when he pulled S.C. Ruffey, their leader, apart.
One of these vans was part of a train which carried sugar for Mr. Jolly's Chocolate Factory. The train was involved in an accident when Percy crashed through the factory building, and they were covered in chocolate.
They have often been used for the Flying Kipper and have been involved in many accidents and adventures while part of the train.