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Published on 21 March 2023

Further to Hasbeen's demonstration of how the clutch-type LSDs in the first GT-HOs failed after a few laps. That was the cause of the tyre problems that afflicted the works team at Bathurst in 1969. There was nothing wrong with the Goodyear tyres. The problem was caused by most of the works drivers accelerating too hard up through the steep and off-camber Griffins Bend at the end of Mountain Straight each lap. Because the LSDs had packed up, they were furiously spinning the inside (right) rear tyres as they became unloaded through there and eventually they wore out and blew. Tyre failures in both the Geoghegan Bros car and the Gibson/Seton car (which crashed and rolled as a result) occurred on their right rears. The only works car not to suffer this fate was Moffat's in his first Bathurst drive. He sensed the LSD problem very early on, so avoided spinning his right rear through Griffins. When they brought him in to change tyres as a precaution, his were fine but it cost him and Alan Hamilton a shot at victory. However, given Ford had been through hell with perceptions of weakness in early Falcons, the last thing it wanted to do was admit that the HOs had faulty diffs. So, publicly claiming that the team simply chose the wrong tyre compounds for the race was a face-saver. And Detroit Lockers were homologated for the Phase II HOs at Bathurst in 1970, which they won. So, racing improved the breed!