Audi A4

since 1994 release

Manual of the car


Audi A4
+ Running gear
+ Regular servicing
+ Engines
+ Turbo-supercharging
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
+ System of injection
+ Coupling
- Transmission and main transfer
   Mechanical transmission
   Noise in the transmission
   Automatic transmission
   Electronic control by the transmission
   Main transfer
   Power shafts
   Check of cuffs of power shafts
   The help at malfunctions
+ Suspension bracket of wheels and steering
+ Brakes
+ Wheels and tires
+ Electrotechnical equipment
+ System of ignition
+ Lighting
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ Body details
+ Salon
Search of malfunctions
Technical characteristics

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The help at malfunctions

Power shafts

Usually to power shafts there are no problems. Their durability depends, certainly, on style of driving of the car. The start with completely wrung out accelerator pedal and the turned forward wheels and a start of motion with the turned forward wheels is led to emergence of premature defect.

  • In hinges of power shafts defects which then completely disappear are often suddenly shown. "Dormant period" can be stretched up to several days and kilometers of the passable way.
  • At supply of gas and gear shifting the rhythmical beating or clicking sounds are characteristic. If these sounds still change depending on turn of a wheel, then probably defect in the hinge from a wheel.
  • Vibration and shiver of a wheel at the turned wheels also indicate the damaged external hinge.

You need a new bolt with a flange and with a six-sided head for a hinged shaft outside on a wheel nave as it stretches at an inhaling and therefore for safety should not be put repeatedly. Then new laying for the internal hinge of a shaft (only in cars with the four-cylinder engine and the mechanical transmission).

 PERFORMANCE ORDER

  1. Take off a cap of a wheel or the central cover at rims from light metals.
  2. Weaken wheel bolts.
  3. Weaken a bolt with a six-sided head on a wheel nave; for this Audi has to stand securely on the earth.
  4. Lift a forward part of the car and record.
  5. Remove a wheel.
  6. If it is necessary, dismantle a cover of a power shaft on the transmission.
  7. Take out from an arm a wire to ABS speed sensor, slightly delay the speed sensor back.
  8. Unscrew bolts of shaft with an internal multigear head on the transmission.
  9. Wring out the driveshaft from a flange from the drive on the transmission.
  10. To take out a shaft, turn as appropriate a wheel.
  11. Installation: put new laying on the internal hinge (only in cars with the four-cylinder engine and the mechanical transmission). For this purpose remove a protective film from laying.
  12. In the beginning insert a power shaft from a wheel. Then cross-wise tighten fixing bolts on a flange of a power shaft from the transmission (M8 bolts: 40 Nanometers; M10 bolts: 77 Nanometers). Do not forget podkladny plastinochka in gomokinetichesky hinges!
  13. Lower the car, block wheels. Tighten a new bolt of a nave of an axis as it is shown below:
  14. M14 bolt: tighten on 115 Nanometers and then on 1/4 turns (90 °).
  15. M16 bolt: tighten on 190 Nanometers and then on 1/4 turns (90 °).
  16. Again push manually ABS speed sensor against the stop.

 Council: Audi describes dismantle of a shaft after removal of cross steering draft and both bearings of hinges of an axis. But dismantle of a power shaft can be carried out by us – as it is described above – without unscrewing of the case of the wheel bearing (the well-known name "rotary fist").


The arrow indicates the central bolt of the external hinge which has to be removed at dismantle of power shafts.


The internal hinge is removed from the transmission after weakening of six bolts with internal multigear heads (arrow). Here the "tripod" hinge on the automatic transmission is shown.

Dismantle of a back power shaft of quattro

For assembly you need the new combined bolt with a six-sided head for a hinged shaft on a wheel nave from outer side. The old bolt for reasons of safety cannot be used again. Besides, you need new laying for the internal hinge of a shaft, a podkladny washer and самоконтрящаяся a nut for fastening of the lever of an axis above, and also самоконтрящаяся a nut for a connecting bar of the stabilizer.

 PERFORMANCE ORDER

  1. Take off a cap of a wheel or facing of a rim from light metal in the middle.
  2. Weaken wheel bolts.
  3. Weaken a wheel bolt with a six-sided head in a wheel nave; for this Audi has to stand securely on the earth.
  4. Lift and record a back part of the car.
  5. Dismantle a wheel.
  6. For dismantle of the left power shaft dismantle the intermediate muffler of system of an exhaust (the head Sistema of an exhaust).
  7. Unscrew shaft bolts with an internal multigear head on differential of a back axis.
  8. Slightly shift ABS speed sensor back.
  9. Disconnect a fixing bolt of a connecting bar of the stabilizer from the case of the wheel bearing (a rotary fist).
  10. Unscrew the axis lever above from the case of the wheel bearing (a rotary fist).
  11. Wring out a hinged shaft from a drive flange on the transmission.
  12. Take out a shaft.
  13. Installation: put new laying on the internal hinge. For this purpose remove a protective film on laying.
  14. Establish a hinged shaft from a wheel in the beginning. Then cross-wise tighten fixing bolts on a flange of a power shaft from the transmission (40 Nanometers). Do not forget podkladny plates
  15. Again mount an axis suspension bracket. In the beginning screw up manually screw connection of the case of the wheel bearing and lever of an axis. Tighten a nut of a connecting bar of the stabilizer on 50 Nanometers.
  16. Again mount system of an exhaust.
  17. Lower the car. Block wheels.
  18. Tighten a new bolt of a nave of an axis as it is told further: tighten on 115 Nanometers and then tighten on 1/4 turns (90 °).
  19. Delay finally screw connection of the case of the wheel bearing / lever of an axis in the car standing on wheels: on 70 Nanometers and then on 1/4 turns (90 °).
  20. Manually again push against the stop ABS speed sensor.

 Councils: Do not move cars with the dismantled hinged shaft, otherwise the wheel bearing will be damaged. As a last resort, install only the external hinge.

Depending on model of the engine and the transmission in Audi different power shafts are put. Upon purchase of a new detail have at yourself identification number of the engine and car.

Dismantle of the external hinge

For all models

1 – lock ring;
2 – remote washer;
3 – dish-shaped spring.


 PERFORMANCE ORDER

  1. Dismantle a power shaft.
  2. On a serviceable cuff unbend a big hose collar, shift a protective cover.
  3. If the cuff is damaged, replace it completely.
  4. Strongly strike with the aluminum or synthetic hammer the hinge from within and thus remove it from a shaft.
  5. Before installation of the new hinge insert a new lock ring into a flute of a power shaft.
  6. Establish a dish-shaped spring and a remote washer – if they are established in this version of a power shaft – as it is shown in the drawing above. Do not forget to put a rubber cuff.
  7. At installation chuck in the hinge a shaft with the synthetic hammer so that the lock ring entered a groove.
  8. Grease the hinge: in the new hinge with an external diameter of 89 mm 90 g of MoS2 lubricant (VW G6), from them 40 g are pressed into the hinge and 50 g in a cuff.
  9. More lubricant is put in hinges with an external diameter of 98 mm: 120 g of MoS2 lubricant (VW G6) are distributed as follows: 80 g in the hinge and 40 g in a cuff.
  10. In the hinges which were in the use, lubricant is only added.
  11. Strong clamp cuff clips.

Dismantle of the internal hinge

Gomokinetichesky hinges

1 – lock ring;
2 – internal gomokinetichesky hinge;
3 – power shaft.


 PERFORMANCE ORDER

  1. Dismantle a power shaft.
  2. Having shown patience, two narrow screw-drivers take out from a groove on the end of a shaft a safety ring which holds the hinge on a power shaft.
  3. Now remove the driving hinge from a shaft; as a last resort slightly help yourself the plastic or aluminum hammer.
  4. If the hinge is not removed in such a way, then it needs to be wrung out from a shaft in a workshop by means of a repair press.
  5. At installation put a cuff in the beginning.
  6. In the version with a dish-shaped spring before installation of the hinge pull a dish-shaped spring over a shaft or check its arrangement: it has to be convex to the hinge on an outer edge.
  7. Pull the hinge over a shaft, put a lock ring.
  8. In such a way the lock ring will not move in a groove. Therefore clamp a power shaft in a vice, put the big screw-driver or a scrap of a pipe to an internal part of the hinge and strongly strike with the hammer the screw-driver.
  9. Counteracting force of a dish-shaped spring, the hinge will move a little back – the lock ring will be able to drop in in a groove.
  10. Grease the hinge: in the new hinge with an external diameter of 100 mm press 80 g of MoS2 lubricant (VW G6), from them 30 g into the hinge and 50 g in a cuff.
  11. More lubricant goes on the hinge with an external diameter of 108 mm: 120 g of MoS2 lubricant (VW G6) are distributed as follows: 35 g in the hinge and 85 g in a cuff.
  12. Only add to the hinges which were in the use, lubricant.
  13. Before screwing up of the hinge (or a cuff flange) grease with VW D3 sealant a sealing surface between a flange of a cuff and the hinge.

Dismantle of the internal hinge

"Tripod" hinges

The "tripod" (1) hinge is not removed from a power shaft. In a different way the situation is with gomokinetichesky hinges, here directly from a power shaft (3) the external hinge (2) and the internal hinge (4) are removed.


 PERFORMANCE ORDER

  1. "Tripod" hinges are not removed from a power shaft. They are on sale as spare parts assembled with shaft and a protective cuff. Therefore when replacing dismantle only the external hinge and replace a shaft with the internal hinge.
  2. If only the protective cuff of the tripod is defective, then the external hinge of a shaft is dismantled. In this case the cuff can be advanced on the cleared power shaft to the tripod. Critical position: the cuff needs to be raised carefully over a convex part in the middle of a shaft. For this purpose grease camber and raise a cuff over a thickening stupid round tools (the spoon handle).
  3. The hinge is filled with 140 g of G 000 605 lubricant. When replacing a cuff add lubricant to the hinges which were in the use.