He denied the Wallabies' scrum was their Achilles heel, but acknowledged that may be the perception outside Australia.
"What we are trying to do here, and I think we did it really well during the Super Rugby, is change that perception everyone has of the Australian team," Ledesma said.
"If you look at most of the Australian teams throughout the [Super Rugby] competition, they were dominating in the scrums, especially the Reds.
"I thought we had a really good run with the Waratahs, too, and I thought the Brumbies did really good.
"It's just showing everybody that we're there to scrum, and we want to contest. We want to dominate over there and we want the least amount of penalties possible and get the ref out of the picture."
Argentina's two tries against New Zealand last weekend came from driving mauls after lineouts and Ledesma expected the Pumas to use that tactic and the scrum to attack Australia. "That's the DNA of the Argentinian team and I think they won't be going away from that and they shouldn't," Ledesma said.
Ledesma conceded the Wallabies' scrum struggled early against the Springboks, but felt it improved as the match progressed and especially after the second-half substitutions.
He says Australia will have an edge in front-row depth over Argentina.
"I thought they [the Argentinian scrum] were quite good [against New Zealand], especially in the first half," Ledesma said.
"But then when the subs came in there was a big difference. I think they don't have the same squad [front-row depth] as we do, like we did against the South Africans."
- AAP