John Bush (Armored Saint, Anthrax) joins Metallica. James Hetfield abandons his vocal duties and devotes himself to guitar alongside Dave Mustaine. Hetfield and Mustaine don't clash over personalities since they aren't vying for the frontman persona, though Dave's substance abuse becomes a serious problem in the late 80's. But John Bush really doesn't work out for Metallica and after Ride the Lightning, he is replaced by Legacy vocalist Steve "Zetro" Souza. Legacy would later become the band Testament with vocalist Chuck Billy.
In 1985, the Metallica lineup is:
Steve Souza - Vocals
James Hetfield - Rhythm Guitar
Dave Mustaine - Lead Guitar
Cliff Burton - Bass Guitar
Lars Ulrich - Drums
This lineup goes on to record the groundbreaking Master of Puppets in 1986 and tours with Ozzy Osbourne. After the death of Cliff Burton, Jason Newstead of Flotsam and Jetsam is brought in to fill bass duties. In the 1988 album, ...And Justice For All, two songs break Metallica into the mainstream: "One" and "In My Darkest Hour." The band collects a grammy for the album in 1989.
Despite this, problems run rampant through the band. Dave enters rehab in late 1989 and in mid-1990, the band begins recording its fifth album, Rust in Peace. The album hits the shelves in 1991, proving to be an uncompromising metal masterpiece. Metallica tours with fellow metal giants Slayer, showing that they could do no wrong in the studio or on stage.
But here is where it all begins to unravel. Steve Souza and Dave Mustaine are once again abusing drugs. James Hetfield is slipping heavily into alcohol abuse. For a time, it seems that Lars Ulrich and Jason Newstead are the only sane members left in the band. Lars tries to solve problems by telling Steve, Dave and James that if they don't go into rehab, they'll be out of the band.
Dave manages to clean up, but James and Steve don't. They are promptly fired in 1993. John Bush is convinced to return to serve the band's vocal duties and guitar virtuoso Marty Friedman is hired to replace James Hetfield. The new lineup enters the studio in late 1993 to record their long awaited sixth album, Load. The album hits the shelves in late 1994. In the wake of metal's perceived death, this album and Slayer's Divine Intervention are held up as signs that metal isn't dead.
But the tours just aren't as big anymore. MTV isn't paying attention. Metallica returns to the studio in 1996 to record Cryptic Writings, their seventh studio effort. Released in 1997, the album manages to land a song called "Trust" on the radio, but many fans are upset over the fact that Metallica seems to have watered down their sound. Even so, Metallica soldiers on, seeming to be stronger than ever.
But that isn't the case. Marty Friedman quits Metallica in 1998, citing personal problems. In actuality, frequent creative clashes with Lars Ulrich and Dave Mustaine influenced his decision to leave the band. Seeing a slot open, a now sober James Hetfield asks Lars and Dave to rejoin the band. James is back in and the band goes back into the studio in 1999.
In 2000, Youthanasia proves to be a giant return to form for Metallica. Touring like madmen, Metallica proves to the world that they can still hold their own.
In 2001, Metallica plays at the Thrash of the Titans benefit show to raise money for the cancer afflicted Chuck Billy of Testament, though they only do it because they are invited by Exodus guitarist Kirk Hammett. The original Legacy lineup is headlining the show and they are fronted by Steve Souza. However, they play a blistering classic Metallica set and manage to smooth over the bad blood with Souza.
The Thrash of the Titans show is Jason Newstead's last performance with Metallica. He quits the band, citing health reasons. Numerous bassists audition for Metallica, but the band settles on Iced Earth bassist James MacDonough. They soldier on to release The System Has Failed in 2003.