Queensland lock Lukhan Tui is back in the Test mix, at the expense of veteran teammate Kane Douglas.
Douglas was a surprise selection in the Wallabies' Newcastle camp, after finding himself out of favour with the Reds in the Super Rugby season, overtaken by Tui and Izack Rodda in the matchday 23.
Wallabies coach Michael Cheika showed faith in Douglas to return to the form he enjoyed in the 2015 Rugby World Cup, but the second rower hasn't been able to challenge for a Test selection.
Tui was part of the Wallabies squad in June, before a knee injury ruled him out of the initial Rugby Championship squad.
Wallabies lock Rory Arnold told media in Canberra this morning he had been impressed with Tui's return to rugby, having put in two terrific shifts for Brisbane City in the NRC."Lukhan had a great year, he's had a great year with the Reds and I've done a bit of work with him in June, when he was brought into the squad," Arnold said.
"It's good to see him being called back into the squad by Cheik and he's strung a couple of good games together in the NRC.
"I'm looking forward to seeing what he has got at training and I'm sure he will be pushing for selection."
Arnold believes Tui, along with fellow Queensland young gun Izack Rodda, have what it takes to push for regular minutes in the Wallabies fold.
Arnold isn't the most experienced player in Cheika's squad but he, along with Adam Coleman and Rob Simmons, have a responsibility to lead the exciting rookies.
"I'll give them a little bit of advice where I do feel comfortable doing that," he said."But we have Simmo as well there, he has played a lot of Tests and he has been around so he will be giving the boys some messages as well.
"Two or three years ago that second row spot, we didn't have much depth coming through so when you look at it now, we have so many guys coming through and I'm looking over my shoulder with young bucks pushing for selection."
Douglas will return to Queensland to play for City in the NRC, as he looks for match fitness.
Former skipper Stephen Moore is also back in camp after the birth of his third child, with Tolu Latu dropping out of the group.
The Wallabies take on Argentina on Saturday September 16, kicking off at 8pm AEST LIVE on FOX SPORTS, Network Ten, Win and via RUGBY.com.au RADIO.
Wallabies squad for Argentina
IN: Stephen Moore, Lukhan Tui
OUT: Tolu Latu, Kane Douglas, Dane Haylett-Petty (biceps)
Allan Alaalatoa, 15 Tests, Brumbies
Rory Arnold, 15 Tests, Brumbies
Adam Coleman, 14 Tests, Western Force
Jack Dempsey, 2 Tests, NSW Waratahs
Tetera Faulkner, 2 Tests, Western Force
Ned Hanigan, 6 Tests, NSW Waratahs
Michael Hooper (c), 71 Tests, NSW Waratahs
Sekope Kepu, 83 Tests, NSW Waratahs
Adam Korczyk*, Queensland Reds
Sean McMahon, 18 Tests, Melbourne Rebels
Stephen Moore, 122 Tests, Queensland Reds
Tatafu Polota-Nau, 74 Tests, Western Force
Tom Robertson, 12 Tests, NSW Waratahs
Izack Rodda, 1 Test, Queensland Reds
Rob Simmons, 74 Tests, Queensland Reds
Scott Sio, 35 Tests, Brumbies
Lopeti Timani, 9 Tests, Melbourne Rebels
Lukhan Tui*, Queensland Reds
Jordan Uelese, 1 Test, Melbourne Rebels
Kurtley Beale, 63 Tests, NSW Waratahs
Israel Folau, 58 Tests, NSW Waratahs
Bernard Foley (vc), 48 Tests, NSW Waratahs
Will Genia (vc), 81 Tests, Melbourne Rebels
Reece Hodge, 16 Tests, Melbourne Rebels
Samu Kerevi, 10 Tests, Queensland Reds
Marika Koroibete*, Melbourne Rebels
Tevita Kuridrani, 50 Tests, Brumbies
Billy Meakes*, Western Force
Izaia Perese*, Queensland Reds
Nick Phipps, 54 Tests, NSW Waratahs
Joe Powell, 2 Tests, Brumbies
Curtis Rona, 2 Tests, Western Force
Henry Speight, 15 Tests, Brumbies