Checking the gearbox for tightness
In the gearbox, oil is not consumed as in the engine, but it can leak out in loose bridges. If on the crankcase the gearboxes are not visible in the engine, but may leak out in loose axles. If the gearboxes are not visible on the crankcase
Manual transmission (early models)
Automatic transmission
Five-cylinder engine
Four cylinder engine
Support the vehicle in a horizontal position.
Loosen the 17 mm Allen screw.
If some oil comes out, then the level is OK.
Otherwise, insert your index finger into the hole and check if the oil level reaches the hole. If yes, then the level is in order.
If there is a shortage of oil, the workshop should add oil of the specified type to the required level.
Attention: It is not recommended to fill the oil yourself with a funnel and a long hose due to its high viscosity.
The right choice of oil (transmission fluid)
Transmission fluid is poured into the gearbox for continuous operation. The metal particles are collected with a magnet.
Audi recommends the following types of transmission fluid:
- Gearboxes - only synthetic oil of viscosity grade SAE75 W-90.
Checking the level of transmission fluid ATF In an automatic transmission
Automatic transmission filled with synthetic ATF (Automatic Transmission Fluid). It also serves as a lubricant for adjusting the pressure in the gearbox. ATF fluid must have the designation Dexron followed by a number. Using the wrong type of fluid can cause transmission problems.
To carry out the test, the ATF fluid must be warmed up to the warmth of the hand, for this you should make a trip for five to ten minutes. The volume of liquid changes with temperature. In a cold state, the level is lower, after a long movement - higher.
Apply the handbrake, put the selector lever in position "R", start the engine at idle.
The dipstick is located on the rear left of the engine in the direction of travel and is equipped with a plastic flag; it must be wiped off with a clean, lint-free cloth.
Insert the dipstick and pull it out again. The amount of fluid between the upper and lower marks is 0.66 liters for a probe with a plastic flag. for a probe without a flag - 0.23 l.
The level must be between the marks. The lower mark of the dipstick without a flag is used to fill in new fluid when it is replaced.
Until mid-1985, ATF was pink and clear. Later they began to produce a dark brown liquid.
If liquid (no matter what brand) it smells burnt, which means it's spoiled.
If the fluid level is low, you should not only add it, but also check the gearbox for leaks. If there is a leak, contact the workshop.
If the fluid level is too high, damage to the gasket between the planetary gear and final drive can be assumed.
Check fluid level in final drive.
If there is too little fluid, you should contact the workshop for repair and replacement of the fluid.
If the level in the main gear is correct, the excess fluid from the gearbox should be drained, because. this may damage the transmission.
Main gear on automatic transmission
The final drive of an automatic transmission uses a different type of fluid than a manual transmission. It must have an SAE 9 viscosity and be designated API GL5 or MIL-L-2105B.
A level check is necessary in the following cases:
- If the final drive housing is contaminated on the outside with transmission fluid.
- If the fluid level in the automatic transmission has dropped or risen, and leaks are not visible from the outside. In this case, it is possible that there is an exchange of fluid between the planetary gear and the main gear, as described above.
Transmission Fluid Replacement
During normal operation, the transmission fluid is changed every 45,000 km. If you have mainly traveled short distances or the vehicle has been driven in poor road conditions, you should change the transmission fluid every 3,000 km. To do this, drain the old fluid and at the same time clean the oil pan and strainer (In workshop).
Checking the liquid level in the neutral hydraulic device
Vehicles with power steering and/or ride height control are equipped with a central hydraulic device. Hydraulic fluid level (type AOE 041 0201 or Aral 1010) checked in a transparent tank at the rear of the engine compartment.
To check the fluid level, start the car at idle.
Vehicles without ride height adjustment are equipped with a cylindrical expansion tank. When the cover is removed, the float of the liquid level control device is visible. The fluid level must be between the two marks. When topping up, add liquid up to the mark "max".
Vehicles with ride height adjustment are equipped with a larger expansion tank that has two pairs of marks for a non-loaded and a fully loaded vehicle.
If the car is empty, the fluid level should be between the two upper marks. If it is fully loaded - between the two lower ones.
When topping up, add liquid up to the mark "max". Usually, a lack of fluid indicates a leak in the system. In this case, you should not just add liquid, but first find the leaks.
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