Manual transmission (bottom view): 1 - right front wheel drive; 2 — front support of the power unit; 3 - gearbox; 4 - left front wheel drive; 5 - differential cover; 6 — rear support of the power unit
The transmission oil poured into the gearbox is designed for the entire service life of the unit. During vehicle maintenance (performed in accordance with the maintenance plan) it is necessary to inspect the gearbox to ensure that there are no transmission oil leaks. If oil leaks are detected, it is necessary to check the transmission oil level in the gearbox housing. Failure to do this simple task can result in significant costs and expensive repairs. In a gearbox that is operated with a low oil level, intensive wear of parts occurs, and they may soon fail. To check the oil level and add oil, the gearbox housing has inspection and filling holes. The inspection hole is closed with a threaded plug, and a breather is screwed into the filler hole - a device that connects the internal cavity of the gearbox with the atmosphere. The breather prevents excess pressure from building up in the gearbox, which could force oil through the seals, and at the same time prevents dust from entering the crankcase.
The gearbox is a technically complex unit, which should only be repaired at a specialized service station.