Wheel nuts have been an issue throughout shakedowns and testing, specifically with regard to the circlip retaining system which replaces the large, machined tangs on the previous nuts.
That circlip has demonstrated a tendency to pop off, while a Ford Mustang out of Grove Racing car lost a wheel in its shakedown, then another from Walkinshaw Andretti United had one come loose in this week's official test at Sydney Motorsport Park.
Multiple teams have been working on solutions, generally some sort of modification to the circlip, and it is thought that WAU was using the older configuration when Nick Percat experienced his drama.
“Looks like they got the wheel nuts sorted out,” said Jones.
“They had two or three different options and they haven't made a decision on exactly what they're going to do, but I think the one that Erebus did and the one that Triple Eight did, looks like one of them will get the nod in the end.”
Jones' theory is that a tighter bell housing is constricting airflow and hence the clutches are failing due to higher temperatures.
“This is the bell housing, which houses the clutch on the back of the engine,” he noted.
“Usually, it's cast or it's just machined a lot bigger.
“This housing the clutch has proved to be a bit of an issue.
“A few teams have been having clutch issues and they're not a hundred percent [sure] why.
“I think it's probably because there's not a lot of air flowing through this and so it's getting quite hot in there, so once you do a practice start, then you do another start a lap later, then the temperature is affecting the clutch.”
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