The Wallabies' fight to retain the Bledisloe Cup was boosted with injured key forward Toutai Kefu cleared to resume training.

Australia's most experienced Test forward saw a neurosurgeon in Brisbane, who gave him the green light to resume training when the Wallabies go back into their Coffs Harbour camp on Friday.

Kefu suffered spinal bruising late in last Saturday's Tri-Nations win over South Africa at Suncorp Stadium in a late and high tackle by Springbok Robbie Kempson.

The prop was subsequently suspended for four weeks for the tackle.

After five days rest, Kefu was put through a battery of tests including strength, nerve and reflex examinations.

The Wallabies will ease their vice captain back into contact work, but he is on course to pass a final check by medical staff next Tuesday ahead of the return Bledisloe in Auckland.

As holder since 1998, Australia can retain the prized trans-Tasman trophy with a victory, regardless of the 50-21 hammering in Sydney last month.

The hard-running No.8 said he still had some numbness, but was confident he would be 100 per cent by Saturday week's must-win game.

"I've been mending up pretty quickly ... so I should be right but the next couple of days of contact training will really determine it."

The packed stadium fell silent as one of Queensland's favourite sons was stretchered from the field and taken to hospital.

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