Continuity mistake: When Roscoe and the judge are in the court room and the town comes to object the strip mine ordinance, the courtroom doors are held shut by a night stick. When the townspeople start to shake the doors you can see that the night stick slides to an angle, then when they cut to a closer view the night stick is level once again.
Revealing mistake: There is one shot of the Duke boys in their car talking to Uncle Jessie with the CB radio. You can hear Uncle Jessie respond (through the radio) while Bo/Luke still has the button on the microphone pressed. When the button on the mic is pressed, no sound comes out of a CB radio at all, as they cannot transmit and receive at the same time.
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Continuity mistake: The Dukes are being chased through a field by countless police cars. The car is kicking up mud and dirt and getting dirty. Eventually the General nails a police car on the right front end (left side facing the film viewer). The car is catapulted up onto two wheels and the General miraculously slides through a barn. However, even more miraculous is as the General goes into the barn, the car is completely polished and shows no front end damage at all. The car leaves the barn in pristine condition.
Continuity mistake: When Bo and Luke pick up the General Lee when Cooter has finished fixing it, there are shots flashing between different parts of the new General. One of the shots is of the word Charger, which is located on the headlight cover when it is closed, but in all the shots before and after the headlight cover is open.
Visible crew/equipment: After escaping (with Daisy's help) from the back of the cruiser, as they are being chased, the sun casts a shadow of the camera and equipment. It can be seen on Bo's shirt as they "drift" through the first circle. This is before the big drift scene when Bo keeps driving around and around the circle.
Continuity mistake: When Luke and Uncle Jesse are in Boss Hoggs' car, in the racing scene towards the end of the movie, Jesse is just about to start lighting and throwing the jars of moonshine. Just before he does, when he takes a drink from one his right hand is holding the cap on his head and the jar is in his left, but in the next shot the jar is in his right hand and the cap is in the left.