AUDI Transmission & Drivetrain Systems 3

Question 1

What is the typical torque split default on a longitudinal Audi quattro with a Torsen center differential under normal driving conditions?

Accepted Answer

50:50 front-to-rear at all times

Answer

The Torsen center differential defaults to a 50:50 torque split under normal traction conditions, but can transfer torque bias up to 75:25 or 25:75 as traction demands change.

Question 2

When replacing an Audi driveshaft prop shaft center support bearing, what precaution must be observed?

Accepted Answer

The prop shaft sections must be marked before disassembly to maintain balance and phasing

Answer

Prop shaft sections must be marked prior to disassembly to ensure reassembly in the same rotational position, preserving the factory dynamic balance and preventing vibration.

Question 3

Which special tool is commonly required when removing the Audi S tronic (DL501) transmission from a longitudinal-engine vehicle?

Accepted Answer

A transmission jack with an adapter plate specific to the DL501 case

Answer

The DL501 is heavy and has an asymmetrical case; using a compatible transmission jack adapter plate ensures safe support and correct positioning during removal and installation.

Question 4

On Audi vehicles equipped with the multitronic CVT (01J), what component varies the effective gear ratio continuously?

Accepted Answer

A steel push-belt running between two variable-diameter pulleys (variator)

Answer

The multitronic CVT uses a steel push-belt (chain-type in later versions) running between two conical pulleys whose effective diameter is varied by hydraulic pressure, providing a continuously variable ratio.

Question 5

An Audi A6 with quattro exhibits vibration at highway speed that worsens with vehicle load but disappears below 60 mph. The most likely cause is:

Accepted Answer

An out-of-balance or damaged prop shaft

Answer

Load-dependent, speed-sensitive vibration that disappears at lower speeds is a classic symptom of a damaged or out-of-balance prop shaft, as centrifugal forces increase sharply with speed.

(AUDI) Audi Certified Mechanic Practice Test

(AUDI) Audi Certified Mechanic Practice Test

AUDI Transmission & Drivetrain Systems 3