General information
For turning wheels on drive shafts (axle shafts) ball joints are located. Thus, the drive of each wheel consists of two joints of equal angular velocities and a shaft. AUDI 80 cars are equipped with two different types of hinges. All manual transmission models with four- and five-cylinder engines and all quattro models (front and rear wheel drive) have a cardan joint of equal angular velocities, the main element of which are six balls. The same hinges on cars with automatic transmission and cars with a six-cylinder engine are installed as external, from the side of the hub.
The so-called hinges «tripod» installed on vehicles with automatic transmission and front-wheel drive vehicles with a six-cylinder engine as internal, i.e. from the side of the gearbox. hinges «tripod» instead of six balls, they have three rollers on needle bearings.
CV joints are protected from moisture and dust by rubber cuffs (anthers), which need to be checked regularly. Damaged or cracked cuffs should be replaced immediately, because moisture and dust that have entered will destroy the CV joint (see illustration 11.0 and 11.0a).
Drive shafts are usually not a problem. Their service life depends on the way you drive. Frequent jerking with the wheels turned instead of starting off normally, etc. are the cause of premature failure of the shafts.
A CV joint failure manifests itself instantly, although after a while the defect may disappear for several days. Characteristic signs of faulty CV joints are rhythmic knocks and clicks when you press the accelerator pedal, as well as when driving in forced idle mode. If, in addition to this, the tone of these sounds changes depending on the position of the steering wheel, then we can confidently say that the outer CV joint is damaged. Vibration and trembling of the steering wheel when turning the wheels are also evidence of a defect in the outer CV joint.
Front wheel drive shaft
Required consumables: driveshaft mounting bolt in the hex hub, self-locking nut for the anti-roll bar, and a gasket for the inner CV joint. This gasket is not needed for vehicles with a six-cylinder engine and a manual transmission, as well as for vehicles with an automatic transmission.
Withdrawal
1. Remove the protective cap from the wheel hub nut.
2. Loosen the wheel bolts.
3. Turn away a bolt of fastening of a power shaft in a nave. The vehicle must be on wheels.
4. Install in front of the car on the goats.
5. Remove the wheel.
6. Turn away nuts of fastening of racks of the stabilizer of cross-section stability from the left and right parties of a suspension bracket.
7. Press out the stabilizer.
8. Remove if necessary a protective casing of a semiaxis.
9. Turn out bolts with an internal polyhedron which fastens a half shaft on a transmission.
10. Press the axle shaft shank away from the drive shaft mounting flange on the gearbox.
For vehicles with ABS, remove the ABS sensor while the axle shaft is disconnected from the hub.
11. Turn the steering wheel in the desired direction to disconnect the axle shaft from the hub.
12. Remove the axle shaft.
Installation
First install the axle shaft in the hub, and only then cross-tighten the bolts securing the shaft to the flange on the gearbox. Tightening torques: M8 bolts - 45 Nm; M10 - 80 Nm. Don't forget to install spacers.
13. Lower the vehicle and tighten the parking brake lever.
14. Tighten the drive shaft mounting bolt in the hub with the following torque:
- Bolt M14 x 1.5. First tighten it with a torque of 120 Nm, and then tighten it ¼ turn (90°).
- Bolt M16 x 1.5. First tighten it with a torque of 200 Nm, and then tighten it ¼ turn (90°).
15. Tighten the anti-roll bar nut to 20 Nm.
16. Slide the ABS sensor back into place.
Rear wheel drive shaft
Required consumables: a bolt for securing the drive shaft to the hub with a hex head, as well as a gasket for the inner CV joint. This gasket is only needed for cars with a five- and six-cylinder engine.
Withdrawal
17. Remove the protective cap from the wheel hub nut (see illustration 10.2).
18. Loosen the wheel bolts.
19. Turn away a hex bolt of fastening of a power shaft in a nave. The vehicle must be on wheels.
20. Place the rear of the vehicle on jack stands.
21. Remove the wheel.
22. Turn out bolts with an internal polyhedron which fastens a half shaft on a box of a reducer of the back bridge.
23. Press the axle shaft shank away from the drive shaft mounting flange on the gearbox.
For vehicles with ABS, remove the ABS sensor while the axle shaft is disconnected from the hub.
24. Remove the axle shaft.
Installation
25. Put a new gasket on the inner CV joint, after removing the protective foil from it.
First install the axle shaft in the hub, and only then cross-tighten the bolts securing the shaft to the flange on the gearbox. Tightening torques: M8 bolts - 45 Nm; M10 - 80 Nm. Don't forget to install spacers.
26. Lower the vehicle and tighten the parking brake lever.
27. Tighten the drive shaft mounting bolt in the hub with the following torque:
- Bolt M14 x 1.5. First tighten it with a torque of 120 Nm, and then tighten it ¼ turn (90°).
- Bolt M16 x 1.5. First tighten it with a torque of 200 Nm, and then tighten it ¼ turn (90°).
28. Tighten the anti-roll bar nut to 20 Nm.
29. Slide the ABS sensor back into place.
Attention! Do not move the vehicle with the drive shaft removed. Otherwise, the wheel bearing may be damaged. In case of emergency, to move the car, install the axle shaft, securing the shank of the outer CV joint in the hub.
Attention! Depending on the type of engine and gearbox, different drive shafts are installed on AUDI vehicles. Please specify the engine code and vehicle identification number when purchasing them.
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