They are one of the all-time great R&B vocal groups, and they’re still going strong today. But with lead members Eddie Levert and Walter Williams now at age 75 and 74 respectively, the O’Jays are beginning to plan an exit.

In a special tribute to the group this morning on the national television show CBS Sunday Morning, Williams and Levert indicated that they’re planning two more years of touring, before hanging up their performance outfits, after nearly six decades together. And “new” member Eric Nolan Grant (22 years in the group) says when his two senior partners leave, then that’ll be the end of the O’Jays.

Originally a regionally popular act in Cleveland (and in fact named after local deejay Eddie O’Jay), the group was together for a decade before getting a major break by teaming with young songwriter/producers Kenny Gamble and Leon Huff. The quintet had a number of minor hits together on Chess Records in the late 60s and early 70s, and frustration with their lack of real success pared the group down to the trio of Eddie Levert, Walter Williams and William Powell by 1972. And it was that lineup that recorded the groups first album on Gamble & Huff’s Philadelphia International Records, Backstabbers. Backstabbers was a triumph, highlighted by the McFadden & Whitehead-penned title track. The haunting song with the great intro (later sampled by Angie Stone on “I Wish I Didn’t Miss You”) became a monster hit, and was followed by the even bigger “Love Train,” which became the group’s signature song. It also began a string of critically acclaimed and commercially popular albums.

During the period of Philadelphia International’s 70s dominance of the airwaves, it was clear that the O’Jays were the foundation of the house. The contrast of the gruff, electrifying voice of Eddie Levert and the mellifluous tones of Walter Williams gave the group the ability to masterfully handle the funkiest cuts Gamble & Huff could throw at them and yet also handle ballads beautifully. They generally received the best songs and the most creative Gamble & Huff arrangements, with far more hits than misses. Songs like “For The Love of Money,” “Livin’ For the Weekend,” and the classic “Use Ta Be My Girl” all appeared to be a year or two ahead of what everyone else was doing, and made each new O’Jays release an event. And, as the vehicle for G&H’s social statements, the group released some of the most intelligent, relevant album cuts of the decade. Their mid-70s albums, especially Ship Ahoy, are worth seeking out.

In 1992, Strain left the O’Jays to again join the reunited Little Anthony & the Imperials. He was first replaced by Nate Best, but ultimately by Grant.

Unlike many of their 70s soul counterparts, The O’Jays never stopped successfully recording successfully, most recently contributing to the Brawl in Cellblock 99 soundtrack last year. However, they’ve faced their share of struggles, too. Levert suffered a parent’s nightmare, with the deaths of Eddie’s sons Gerald and Sean in 2007 and 2008. And in 2010, Williams revealed that he had been suffering from multiple sclerosis for years.

This year will be celebrating their 60th anniversary together. With Levert living in Las Vegas and Williams in Cleveland, the group’s founders continue working both together and separately. But they continue to perform around the world and are still bringing it well into their eighth decade of life.

It will be a sad day for the music world when the O’Jays ultimately hang it up in 2020, but we’re looking forward to fully cherishing their last couple years of performance excellence.