It is thought that both were also back on-track last Tuesday (January 24) in an outing which largely flew under the radar.
While the Camaro was used as the mule for that task, with work on the Mustang focused on calibration of its Coyote-derived engine, the handling trait was experienced in both rather than being Camaro-specific.
Sources indicate that the tweak is not a complete solution to the lightness, but will be an improvement.
The revelation comes as most teams delay the initial rollout of their Gen3 cars until next Tuesday, February 7 at the earliest.
The Blanchard Racing Team appears to still be pressing ahead with its plan to run its single Mustang on tomorrow's (February 1) original Winton shakedown date, notwithstanding that the modified rack will not be ready by then.
However, Triple Eight and Ford homologation team Dick Johnson Racing had already decided by the end of last week that they would not be on-track with their race cars yesterday (January 30), when Sunshine State-based teams were originally set to conduct shakedowns at Queensland Raceway.
Instead, DJR and Matt Stone Racing are set to head out to the Ipswich circuit on February 7, while Triple Eight and PremiAir Racing, whose crews are working together on the build of their first Camaros, will do so on Thursday, February 9.
Supercars has now left teams to conduct a “flexible testing program”, with both the 60km shakedown limit and the stipulation that a team must test all of its cars on the same day as each other removed.