Skipper Steve Smith had lamented the quiet, virtually shy approach of his Test team during a recent 3-0 series loss in Sri Lanka.
"Steve hit it right on the head," said Lehmann after the Australian squad arrived in Johannesburg for a series, which begins at SuperSport Park in Centurion next Friday.
Lehmann believes that the one-day side differ from the Test team in that they were more inclined toward sledging.
"The one-day guys are pretty vocal," he assured reporters. "I think we can look forward to a pretty fiery series.
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Lehmann said he chose a young team, including uncapped bowlers Joe Mennie, Chris Tremain and Daniel Worrall, to give some Test stalwarts a break.
"We do turn over players a bit in our one-day set-up because you have got to give the Test players a break somewhere."
New ball pair Josh Hazlewood and Mitchell Starc have been rested ahead of a November Test series at home to South Africa.
Australia will warm up for the South Africa series with a match against Ireland next Tuesday at Willowmoore Park stadium in Benoni on the eastern outskirts of Johannesburg.
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