"Sledgehammer" was initially written during the
Birdy sessions in 1984. A version was recorded featuring bassist
Leland Sklar and drummer
Chester Thompson, but Gabriel was not satisfied with it. Thus, in Spring 1985, Gabriel presented the song just as they were packing up their equipment after initial sessions, citing his original intention to include the song on his next album after
So.
Manu Katché was preparing to board a taxi and return home to Paris when Gabriel coaxed him into recording "Sledgehammer". The song was recorded live in two or three takes with the full band playing and Gabriel on keyboards and vocals.
Tony Levin opted to record his part on a
fretless bass with a
pick and through an octave pedal. Gabriel noted that he was influenced by soul music when writing "Sledgehammer" and also considered recording a soul-oriented album with a mixture of covers and original compositions. Gabriel contacted Jackson to assemble a horn section that included Jackson on trumpet,
Mark Rivera on saxophone, and Don Mikkelsen on trombone. Gabriel explained that he wanted a real horn section on "Sledgehammer" to capture some of the intricacies of brass playing that could not be achieved with a synthesiser. He cited the slow brass swells in the second verse as an example of the expressiveness that he desired. The song also features a
synthesised shakuhachi flute generated with an
E-mu Emulator II sampler. Gabriel said that the "cheap organ sound" came from an expensive
Prophet-5 synth, which he regarded as "an old warhorse" sound tool. ==Release==