In fact, its replacement is also necessary – the gearbox is subjected to serious stress, and the oil in it performs three functions at once:
Experts recommend changing the oil in the gearbox after 100,000 kilometers (60,000 miles) of mileage or every 7 years of car operation (depending on which event occurs first).
If the Your vehicle is subjected to heavy loads or operated in adverse conditions, it is better to play it safe and do it after 60-70 thousand km (35-44 thousand miles) of mileage.
The technology for changing oil in a gearbox (both automatic and mechanical), a variator, a gearbox, a transfer case is different from the technology for changing oil in an engine. And these fluids themselves are different in these nodes of the car.
Moreover, the composition of oil for an automatic transmission is different from that for a manual transmission, and they cannot be interchanged.
However, depending on the driving style and conditions of operation of the vehicle, these terms can be shorter.
Change the oil every 6-7 thousand km (3-4 thousand miles), if:
It is quite difficult to make an engine oil change competently and safely without sufficient experience and equipment. In addition, when changing the oil, it is necessary to replace the oil filters.
Another point: you need to select the necessary oil specifically for the engine of your vehicle, because the properties of a certain composition may be suitable for a gearbox, variator, gearbox, transfer case, but categorically not suitable for the engine.
How often this should be done depends on the model of your vehicle and its operating conditions.
In any case, the level of all liquids should be measured regularly.
If the liquid is dark, dirty in color or has a burning smell, it requires immediate replacement, and the system needs to be cleaned of the expansion tank.
The theoretical terms for replacing brake pads and discs are indicated in the service book. But in practice, everything depends on the degree of actual wear and tear. It, in turn, is influenced by many factors: driving style, condition of the road surface, season, etc.
On average, discs begin to require attention after 80,000 km (50,000 miles) of mileage, but the pads are less stable, their resource is exhausted after 12-17 thousand km (7,500-10,000 miles).
Brake discs fail according to a similar pattern: noises in the wheel area, drifts during braking, changes in the braking distance itself and fluid consumption.
It is important to keep in mind that replacement of brake system parts is carried out exclusively in pairs on one axle.