Bengineering

5 in a row all with a failed 3rd gear. What was once considered a upgrade, it now seems to be the drivelines weak point. The Nissan RB25DET gearbox purchased either new or second hand units are breaking . What has changed ? increased power levels ?aggressive driving style ? heavy duty clutch ? Tyres used ? Duration spent on track ? 🤷🏿‍♂️