The gears in an auto transmission box are metallic discs of various dimensions with diverse ridges and number of tooth. They may be in all car or truck gearboxes, set around the shafts (other than the primary shaft), and will slide in both way. Kalau korang perasan ada tanda gearbox https://angelofbsep.onesmablog.com/little-known-facts-about-komponen-gearbox-auto-74798113