Valtteri Bottas and Esteban Gutierrez will both take five-place grid penalties in Australia after being forced to change their gearboxes.
All teams put their race gearboxes in for today, and both drivers suffered problems almost immediately having recorded only two laps apiece. Their teams have confirmed that they will need a change.
Under the 2014 rules gearboxes are required to complete six consecutive Saturday/Sundays. Gearbox use remains free on Fridays.