Then in the mid 70's disco came around and pretty much killed Grand Funk. Frank Zappa produced their last great album in 1976 and Farner left the band to pursue a solo career. What I found interesting is that in 1988 Mark Farner scored a #2 gospel hit with the song "Isn't It Amazing". The band has reunited several times for various reasons through the years. If you were between the ages of 10 and 25 in the early seventies chances are you owned a Grand Funk album, probably several. We're An American Band was Grand Funk Railroad's seventh studio album, and was released in July 1973 and was the first album to feature Craig Frost as a full-fledged band member. The original issue was on a translucent yellow disk. The label, above the side numbers, instructed listeners to play "at full volume", which I always did. I played the crap out of that piece of yellow vinyl.