1. Check is carried out on a cold transmission. Wipe dry the crankcase next to the filler / control plug, which is located on the side of the gearbox (photo)
2. Unscrew the plug and clean. The oil level should reach the lower edge of the filler hole. If the oil starts to flow out when the plug is unscrewed, then the level is normal.
3. If necessary, add oil with a pear or syringe.
4. Replace the plug and tighten to the specified torque. Drive around and check for leaks.