Turn the steering wheel to the right or left as far as it will go and turn the front wheel.
While illuminating with a lamp, inspect the rubber protective covers of the equal angular velocity joints, squeezing them to open the folds. Check them for cracks, which can lead to grease leakage, as well as water and dirt ingress. Also check the condition of the mounting clamps, inspect the covers of the internal hinges and casings on the other side. If damaged, the protective cover must be replaced immediately (see fig. 1.26)
Also check the general condition of the CV joints by holding the drive shaft while trying to turn the wheel. Try again while holding the inner CV joint and turning the drive shaft. Any noticeable play indicates wear on the joint, wear in the shaft grooves, or loosening of the drive shaft mounting nut.
Lower the car.
Visual inspection of the gearbox for tightness
Oil leaks from the gearbox are possible in the following places:
- at the junction of the gearbox housing with the cylinder block;
- at the junction of the drive shaft to the gearbox;
- around the oil drain plug;
- around the oil filler cap.
To determine the location of an oil leak, follow these steps:
- clean the gearbox housing;
- cover possible leaks with a thin layer of chalk or talc;
- make a test drive for a distance of about 30 km;
- raise the car on a lift or place it above the inspection ditch and determine the location of the oil leak by smudges;
- repair the leak and fill the gearbox with oil.
Visual check of the main reverse gear on A6 quattro cars
The main reverse gear is filled with 1.5 liters of gear oil of specification GL5 SEET 90 (MIL-L 2105 B). An oil change is not included.
Oil leaks can be observed from the side of the oil filler plug (see fig. 1.27).
The oil level should be at the bottom edge of the oil filler hole. The screw plug must be tightened to a torque of 35 Nm.
Checking the oil level in a manual transmission
An oil change in a mechanical box is not provided. The oil level must be checked as part of maintenance.
To unscrew the screw plug, depending on the vehicle version, a 17 mm hexagon socket or a socket with an internal polyhedron, such as HAZET 2567-16 or AUDI-3357, must be used.
To measure the oil level, it is necessary to use a steel wire, one end of which is 10 mm bent at an angle of 90°.
The manual transmission uses synthetic gear oil SAE 75 W 90 according to AUDI specification G 052 911 A:
- Front wheel drive - 2.25 l
- Front wheel drive / 2.5-I-TDI - 2.25 l
- Four-wheel drive, depending on the model - 2.3-3.6 liters
Examination
Raise the vehicle on a lift or place it over a pit.
Remove the lower mudguard of the engine compartment.
The oil filler screw is located in the gearbox in front of the left drive shaft and can be covered with a heat shield. If present, unscrew the heat shield.
Unscrew the screw plug from the oil filler hole (see fig. 1.28).
Front-wheel drive vehicles, except vehicles with 2.5-I-TDI engine. Using a bent wire as a dipstick, check the oil level in the gearbox (see fig. 1.29). When checking, keep the wire horizontal, the bent end of the wire should be directed straight down. Remove the wire and measure the oil level on the wire. The oil level should be 7mm below the lip of the oil filler hole.
All-wheel drive vehicles with a 5-speed gearbox, as well as vehicles with a 2.5-I-TDI engine. The oil level should be at the bottom edge of the oil filler hole.
All-wheel drive vehicles with a 6-speed gearbox.The oil level should be 1 mm below the lip of the oil filler hole.
If the oil level is below the required level, check the gearbox for leaks.
Add oil if necessary and tighten the plug to 25 Nm. On vehicles with 2.5-I-TDI / 2.7-1 / 4.2-1 engines, tighten the plug to 40 Nm.
If available, install a heat shield.
Checking the oil level in the main gear of automatic transmissions
The main gear of automatic transmissions uses synthetic gear oil SAE 75 W 90 according to AUDI specification G 052 145, and on gearbox 01J according to AUDI specification G 052 190:
- 4-speed automatic transmission 01 N - 0.75 l
- 5-speed automatic transmission 01V - 0.8 l
- 5-speed automatic transmission 01 L - 1.3 L
Transmission Multitronic 0J..1.4 l On a 5-speed automatic transmission, a new O-ring must be used when installing the screw plug.
Changing the oil and checking the level in an automatic transmission is not provided.
Checking the oil level
Take a short drive to warm up the oil in the automatic transmission to 60°C.
Raise the vehicle on a lift or place it over a pit.
Remove the lower mudguard of the engine compartment.
4-speed automatic transmission.Unscrew the screw plug from the oil filler hole (see fig. 1.30). Check the oil level, which should be at the bottom edge of the oil filler hole. Screw in the screw plug and tighten it to 25 Nm.
5-speed automatic transmission.If present, remove the heat shield. Unscrew the screw plug from the oil filler hole (see fig. 1.31). Check the oil level, which should be at the bottom edge of the oil filler hole. Screw in the screw plug with a new O-ring and tighten it to 35 Nm. If available, install a heat shield.
Gearbox Multitronic.If present, remove the heat shield. Unscrew the screw plug from the oil filler hole (see fig. 1.32). Check the oil level, which should be 8.5 mm below the lip of the oil filler hole. Screw in the screw plug and tighten it to 20 Nm. If available, install a heat shield.
Install the lower engine compartment mudguard.
Checking the condition of the oil
When checking the oil level in an automatic transmission, also check the condition of the oil. To make it easier to check the condition of the oil, compare the color, smell and viscosity of the oil with new oil.
If the gearbox oil is dark or almost black with a burnt smell, the gearbox friction linings are worn out.
If the oil in the gearbox is milky, it means that water has got into it. This can happen when the car is constantly used for short trips. If the color of the oil does not change after a long drive, the oil needs to be changed.
If the oil is dark brown and sticky, it may be due to overheating of the gearbox or too high oil level in the gearbox. If an oil change fails, the vehicle must be taken to an AUDI specialist workshop.
If, when checking the oil level in an automatic transmission, there are dirt particles or metal chips in the oil, it is necessary to diagnose or repair the automatic transmission at a specialized AUDI service station.
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