The Springboks were praised for showing a lot of attacking intent in the recently completed Rugby Championship when they finished second behind the All Blacks.
Their last match at Ellis Park was a high-paced encounter and despite the Boks going down 38-27, they scored some spectacular tries and made numerous line-breaks.
However, the 46-year-old Teichmann believes South Africa should temper their approach on Saturday and employ their renowned power-game to wear down the Six Nations champions.
In an interview with the Wales Online website, Teichmann predicted a Springbok victory but warned that if the Boks try and play an expansive game from the get go, they could find themselves in trouble.
He said the Welsh will capitalise on Springbok mistakes and said Heyneke Meyer’s charges should “bulldoze Wales” by not playing to their strengths.
He said the Boks must focus on dominating the set pieces before earning the right to unleash strike-runners like Jaque Fourie, Jean de Villiers, Bryan Habana and JP Pietersen.
Teichmann, who played 42 Tests for the Springboks between 1995 and 1999, also said he was impressed by “some fantastic youngsters with an enormous amount of talent” coming through for the Boks and feels coach Heyneke Meyer is building a special team