Turner and BTO enjoyed a period of peak popularity between 1973 and 1976, which saw the band release five Top 40 albums and six US Top 40 singles (eleven in Canada). When Randy Bachman left Bachman–Turner Overdrive in late 1977, Turner switched from bass to rhythm guitar to make room for bassist–vocalist Jim Clench. This new line-up for 1978–79 was only called B.T.O. and nothing else, due to legal issues surrounding the use of the Bachman surname. After two albums and supporting tours, this version of B.T.O. called it quits in early 1980. Turner resumed his original role on the bass upon rejoining Randy Bachman in a band called Union, which released a 1981 album titled "On Strike". Bachman–Turner Overdrive then re-formed for a 1984 album and subsequent tour. Turner continued to perform in touring versions of B.T.O. through 2004, with the only new original material being released on the 1996 album "". Turner's last performance on stage with any formation of B.T.O. was in 2004 with Randy Murray. The two were backed by members of the Little River Band because drummer Robbie Bachman and guitarist Blair Thornton were unable to attend B.T.O.'s last show. Turner is the only member of Bachman–Turner Overdrive to be on every album the band released.