If im driving and the gears lock up and its not the transmission infiniti i30?

If the gears in your Infiniti I30 lock up but it’s not a transmission issue, it could be due to a problem with the shift linkage or the shifter itself. Additionally, a malfunctioning clutch, if it's equipped with a manual transmission, could cause similar symptoms. It's also worth checking for any issues with the brake system, as a stuck brake can affect gear engagement. It's best to have a professional mechanic inspect the vehicle to diagnose the exact cause.