So, you found that the automatic transmission oil level is
higher than the norm. View here for more info: symptoms of too much transmission fluid
First of all, it is important to know that the oil is not measured "cold" . The correct measurement is carried out on a heated box, guided by the HOT mark, and not COLD on the automatic transmission oil dipstick.
When the oil level rises, the box may immediately start to work incorrectly - jerks, automatic transmission kicks, errors, etc. may appear, but also, it may not give any signs and symptoms of the problem.
Even if the transmission is working properly, it is important to understand that an increase in the oil level is not permissible and a
high oil level in an automatic transmission is just as dangerous as a low one.
Overflowing oil in the box can lead to serious consequences, up to the overhaul of the automatic transmission.
ATF heats up a lot, the volume of fluid from work increases greatly, which leads to foaming, leaking gaskets and seals, and as a result of a violation of the tightness of the automatic transmission , etc.
From the overflow, the oil begins to foam , the pressure of the foamed fluid is insufficient , the lubrication deteriorates, and the clutches begin to slip . An additional sign of overflow and foaming is air bubbles visible on the dipstick.
The oil begins to cool worse, jerks appear when shifting gears, and the wear of the gearbox parts increases noticeably.
If such symptoms appear, stop operation immediately and check the oil level in the machine "for hot"
How to correctly measure the oil level in an automatic transmission.
Normally, the level should be between the HOT and COLD marks.
Displacement towards HOT is allowed by no more than 2-3 mm.
You only need to check the oil on a well-heated automatic transmission.
In order to heat ATF to operating temperature, you must drive the car for at least 10 km. Then the car should run at idle for about 5 minutes, after which the selector should go through the main automatic transmission modes, lingering in each for about 2-3 seconds.
Then the engine is not turned off, leaving the selector in position P. The
dipstick is removed and cleaned, then insert it all the way for 2-3 seconds.
What will happen if you pour oil into an automatic transmission should be known to all motorists driving a car with automatic transmission. The main rule is how much car oil is drained, and this should be filled. When the grease is heated, its volume becomes larger. This leads to increased compression. The oil in the box foams, flows out through the dipstick hole.
Overflow of oil in the box may be caused by the fact that when draining the spent oil, a small fraction of it remains in the checkpoint. In view of this, when changing the oil fluid, it is advisable to control its level with a dipstick. If necessary, top up by increasing the amount of lubricant in the unit.
The consequences of a lubricant overflow are as follows:
- · the compression in the automatic transmission will increase;
- · friction elements will slip;
- · jerks will appear when changing gears.