James Best based the "coo coo" sound that Rosco made whenever he got excited on noises he used to make when he played with his children. He did this to make Rosco more childlike and therefore less of a threat to the Dukes.
Ben Jones (Cooter) actually owns a small chain of stores called "Cooters Place" in Pigeon Forge and Nashville, Tennessee, and Luray, Virginia, dedicated to all things related to the show.
Waylon Jennings provided the voice of "The Balladeer," the off-screen narrator of each episode. He also sang the show's theme song, "The Good Old Boys", which became a hit single record in 1981. In the single version, there is an additional lyric at the end of the song: "You know my mama loves me... But she don't understand, they keep a-showing my hands, and not my face on TV!" This refers to the fact that it is indeed Waylon Jennings' hands playing the guitar in the opening credits, while his face is not shown. Jennings' mother had complained to him that she watched the show regularly, waiting for her son to appear, but he never did. This was finally remedied in Season 7, when Jennings made a guest star appearance as himself in the episode, Welcome, Waylon Jennings (1984).
A lot of cars were crashed during production. Replacing the police sedans was easy, but replacing the "General Lee" was much harder because Dodge stopped making the Charger. It got to the point where if producers saw a Charger on the street they would approach the owner and offer to buy it on the spot.