Cameron Waters was struck by axle failures in both races, while Mark Winterbottom felt he’d struck a tyre problem – as he had at Phillip Island – on his way to 20th on Sunday.
Winterbottom started 18th after a tangle with Shane van Gisbergen in ARMOR ALL Qualifying, before gaining five places on the opening lap.
However, the Bottle-O Ford was 22nd by the time the second stops began after a long first fuel fill proved costly.
“[The first stop] just made us way too heavy throughout that [second] stint, we just burnt time in that whole stint,” he explained.
“I lost a lot of positions, then when we came out for the last stint I went out for about three laps and I think I broke a chord in the tyre again.
“I dropped two seconds a lap and it changed the balance tenfold, so I reckon I’ve broken another cord, and that was three laps into a 20-lap stint, so it made my life a lot harder than it needed to be.
“It was a tough way to end the weekend, but we have a few weeks to try and diagnose our issues, so we’ll dig through the data and get back out there in Darwin.”