In Silent But Stinky, Dirty and Stinky are voiced by new actors, Jet Jurgensmeyer (Dirty) and Issac Ryan Brown (Stinky) because the original actors' voices changed.
In Silent But Stinky, Chopper asks for a "Big Yellow Circle" because he has just such a big yellow circle at his own landing pad - seen in the season one episode, Water Ways.
Make Way For Sweepy was inspired by the movie Speed.
The section of song used during the bumpy road sequence in Make Way for Stinky, is taken from Dan Bern's "Rollin' Along," song in season one.