McLaren denies wrongdoing over gearbox
The under-fire championship leading team has been put under investigation to see if it is in breach of Formula 1 regulations in not having the updated gearbox subjected to a new crash test prior to the event.
The Woking squad insists it has acted inside the rules and says is expects the stewards to come to the same conclusion.
"McLaren would like to emphasize that we have acted in entirely openly, in good faith and in complete compliance with the FIA rules and we are confident that the stewards will come to the same finding," a team statement read.
"On Thursday of the Hungarian Grand Prix, McLaren voluntarily made the FIA aware that the team would be using a new reduced weight gearbox casing.
"Before qualifying the FIA asked McLaren to supply after the race weekend some documentation concerning the precise changes that had been made.
"This was supplied before the Turkish Grand Prix, but subsequently McLaren was advised by the FIA that in their opinion the revised gearbox needed to undergo a repeat crash test."
The team says it subsequently decided not to run the new gearbox at the last race in Turkey and that after passing the crash test last Thursday, will be back on the car at Monza this weekend.
“As a result the team chose not to use the lightweight gearbox at the Turkish Grand Prix," the statement read.
"On 30th August the McLaren lightweight gearbox passed both a push off test and an impact crash test without any problem under the supervision of the FIA.
“Consequently the team will use the lightweight gearbox at the Italian Grand Prix."