A few other gears like very first velocity, second velocity, and reverse speed equipment can also be rigidly fastened towards the countershaft or generally known as layshaft. Two gears mounted about the splined main shaft might be slid by the shifter yoke if the change lever is operated. From https://rafaelikige.glifeblog.com/31496729/new-step-by-step-map-for-gearbox-kereta-auto