Audi 80/Avant (B4)

since 1991-1995 release

Repair and operation of the car

Audi 80/Avant
- Technical specification
   15-inch wheels
   Brake system
   Passive safety
   Four-wheel drive
   Distributive Torsen-differential
   Dynamics of the movement at a dry paving
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   Organization of a workplace
   Lubricant works
   Oil consumption
   Right choice of engine oil
   Replacement of engine oil and oil filter
   Check of level of working liquid of the power steering
   Check of level of oil of the mechanical transmission
   Check of level of oil in the drive of the back bridge
   Control of the ATF level in the automatic transmission
   Check of level of oil in the main transfer of the automatic transmission
   ATF replacement
   Lubricant of hummock drives, hinges and locks
+ Engines
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Lighting
+ Signaling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
+ Specifications

Instructions on operation for all-wheel drive cars

The general

  • If the forward bridge or one of forward wheels is raised, the drive is absent.
  • If the back bridge is raised, the drive is absent.
  • If one of back wheels is raised, the drive is absent, in that case if the differential of the back bridge is not blocked.
  • If the driveshaft is separated from the transmission, the drive is absent.

Check of brakes


  1. Check of action of brakes can happen poosno at the normal test bench for check of brakes at a low speed (max of 6 km/h).
  2. At the same time the drive has to proceed from the test bench.
  3. Transfers or blocking of differential should not be included.

Check of power


  1. Check of power cannot be made at the ordinary test bench by determination of power for two driving wheels.
  2. It is necessary to use the test bench for four wheels.


The suspension bracket of a back wheel of Audi 80 quattro consists of the following details:

1 – top cross lever;
2 – stabilizer;
3 – case of the wheel bearing;

4 – power shaft;
5 – lower cross lever.

  • All four wheels have to have the identical piece of a way passed for one turn (ideally the identical depth of a profile of a protector).
  • Balancing of wheels on the car (dynamic balancing) is possible only if all four wheels are raised. The drive has to proceed from the car engine (not from the balancing machine).

     Important: to switch-off the emergency brake.

Winter tires

  • It is better to use winter tires not only on front, but also on all-wheel drive cars not so much because of dynamic how many because of brake properties.
  • Chains of antisliding have to be put on in those places where their use as well on all-wheel drive models is offered. And here an argument in favor of their application are the best brake properties.


  • If at towage all four wheels of Audi slide on a paving, then no special instructions are required.
  • If wheels of one of bridges (after accident) are not able to slide any more, it is necessary to ship the car on the low-frame tow truck.
  • If the similar tow truck out of striking distances, it is possible to tow the car and with one raised bridge. Condition: not further than 50 km and not quicker, than 50 km/h. Blocking of differential should not be included (however, it is already improbable). At an exit for a framework of the specified limits damages of the transmission because of a lack of lubricant are possible.