Why would your gearbox warning light come on during city driving and not on highway driving?

The gearbox warning light may come on during city driving due to frequent stop-and-go situations that put added stress on the transmission, potentially revealing underlying issues such as overheating or low fluid levels. In contrast, highway driving typically involves more consistent speeds, which can allow the gearbox to operate smoothly without the same level of strain. Additionally, city driving may expose problems with the transmission's electronic systems or sensors that aren't as apparent during steady highway conditions. Regular maintenance and timely diagnostics are essential to address any issues indicated by the warning light.