McLaren explains transmission issue that limited Lando Norris's running in Australian GP practice

Lando Norris's first day of practice for the Australian Grand Prix was hampered by a 'transmission control issue' that sidelined his McLaren for most of the first session, putting him on the back foot in a crucial weekend for data gathering under new regulations. While teammate Oscar Piastri topped the timesheets, Norris managed only limited running and finished the day over a second off the pace, acknowledging the team has work to do to recover lost ground.

Why it matters:

With significant regulation changes in effect, every lap of practice is critical for teams to understand their cars and optimize setup. For McLaren, which showed strong pace with Piastri, losing valuable track time on one car creates a data deficit and disrupts the development rhythm for the weekend, potentially impacting their qualifying and race strategy.

The details:

• The problem was identified in FP1 as a 'transmission control issue' on Norris's MCL40, limiting him to just seven laps before the team parked the car with 20 minutes remaining in the session.
• The issue was resolved before FP2, allowing Norris to complete 29 laps, but his best time was 1.2 seconds slower than Piastri's session-topping 1:19.729.
• Piastri's strong performance placed him ahead of Mercedes' Kimi Antonelli and George Russell, with Ferrari's Lewis Hamilton and Charles Leclerc, and Red Bull's Max Verstappen also slotting in between the two McLaren drivers.
• McLaren Chief Technical Officer Rob Marshall described the day as "positive overall" despite the early setback, noting improvements in consistency and data collection during FP2.

What's next:

McLaren's engineering team faces a busy night analyzing data to help Norris close the gap. The focus will be on refining car setup, tire management, and power unit optimization ahead of FP3 and qualifying.

• Norris emphasized the importance of the overnight work, stating the team needs to "close that gap" before the final practice session.
• With Piastri demonstrating the car's potential speed, if the team can effectively translate their findings to Norris's side of the garage, both drivers could be in contention for strong grid positions on Saturday.