Seconds after setting the fastest lap at Mount Panorama Jason Bright was forced to retire from today's final practice session with broken transmission.
His time, set on old tyres, fared well as the V8 Supercar field finished the session on new rubber, with Team BOC only dropping to sixth-fastest at the chequered flag.
Andrew Jones finished 12th in the co-driver practice session and says the car is good given today's searing track temperatures.
Tomorrow will see two final practice sessions before qualifying at 3pm.
"We had a massive transmission vibration coming down Conrod. I didn't know what it was at that stage. Everything was shaking that much it was making me cough. Not good. I stopped as quickly as I could to minimise the damage. I'm just lucky it happened where it did because a few metres down the road and who knows what would have happened.
"The car's been quick all day so any small improvement would see us looking very strong. We still had a set of greens to come in that session and I think we could have looked pretty good at the end of the day.
"I'm probably not as happy as I've been at other rounds and we're right on the pace so that's a very positive place to be. We've improved it a lot over the day. It's still definitely edgy but it's going to get better as the track comes up."
Team BOC Co-Driver
"The track temperature today was 55 degrees and it's probably the hottest day we've had up here at Bathurst in a long while. Everybody up and down the pit lane will be saying their cars feel terrible because the track surface is so hot.
"Tomorrow's going to be 19 degrees so the cars will probably feel good again but today's track temp is similar to the forecast for Sunday so it's more indicative of what we'll get. If today's anything to go by it's going to be a slow race and a real battle to keep these things on the road!"