Alan Spencer originally wrote the pilot script in 1976 as a parody of डर्टी हैरी (1971) and its sequels. Every network rejected it, and executives questioned Spencer's mental health because of the exaggerated violence. Networks began showing an interest in Spencer's script after the success of सडन इम्पैक्ट (1983).
David Rasche, described to be a very well-adjusted person, revealed in the Sledge Hammer! DVD that contrary to the relationship that Hammer and Captain Trunk had, he and Harrison Page became good friends and still, to this day, keep in touch.
Sledge Hammer's catch phrase was originally written as "I'm crazy, but I know what I'm doing." But ABC executives objected to the main character being "crazy" so it was changed to "Trust me, I know what I'm doing."
Harrison Page said that when he auditioned for the role of Captain Trunk, he pictured him as an extremely exasperated man, and chose to play him constantly yelling at Hammer. He did that, which alerted other people in the building, and got the role.
The pilot initially rated poorly with a test audience. ABC added a laugh track and screened it a second time. The test audience rated it higher the second time. Although Alan Spencer was protested strongly, ABC insisted that the series air with a laugh track. The track was removed halfway into the first season.