From Longman Dictionary of Contemporary Englishlow gearˌlow ˈgear noun [countable, uncountable] TTCone of a vehicle’s gears that you use when you are driving at a slow speed
Examples from the Corpus
low gear• He never left a low gear yet when I glanced over my shoulder he was miles clear.• Glover stayed in low gear for the crawl into town.• Just put it in a really low gear and floor it.• Time passed in very low gear. 