AC/DC's members are mostly in their golden years, but they remain one of rock's top draws. Still, one day the band's members may eventually call it a career. In recent times, they've had guitarist Malcolm Young bow out of the band over health issues, while drummer Phil Rudd's scrapes with the law have been well documented. But still, they've soldiered on. In a new interview with The Morning Sun, AC/DC vocalist Brian Johnson discusses the idea of retirement and how the band views their future at this point.

The band is currently in the middle of their 'Rock or Bust' world tour, and with questions arising as to whether this may be the band's last extensive trek, Johnson addresses the topic of whether the band has thought about calling it a day. "Retirement is like anything," Johnson says. "A good footballer, a good ice hockey player, they don't want to retire, but unfortunately sometimes there's a time when you have to call it quits. So it's an ongoing thing with us. We never say no and we never say never."

He adds, "The thing about the boys in AC/DC, you’ve got to remember, is we’re constantly surprised and amazed at how we keep the success going. We don’t know what we’re doing -- I mean, we literally don’t know what we’re doing except what we’re doing is we just play 100 percent every night and give it everything we’ve got. If that’s the secret of success, we’ll pass it on."

But while the band remains a top draw, Johnson says they're well aware that fame comes and goes and sometimes comes back around. "We never expect the crowds," says the singer. "We never take anything for granted. How can you? Times change. You’ve just got to keep doing what you’re doing, basically, and just hope they come back for more.”

As mentioned, AC/DC are currently in the midst of their North American tour in support of the Rock or Bust album. Dates for the run can be found here.

See Where Angus Young Ranks on Our Top 50 Hard Rock + Metal Guitarists List

Top 10 AC/DC Songs