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

40:60 front-to-rear bias

Answer

60:40 front-to-rear bias (front-biased)

Answer

Rear-wheel drive only until slip is detected

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

The bearing must be heated to 250°C before pressing on

Answer

The center bearing is non-serviceable and the full prop shaft must be replaced

Answer

The driveshaft must be balanced on a lathe before reinstallation

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

A universal flywheel locking pin

Answer

A CV axle separator tool

Answer

A torque converter alignment mandrel

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

A pair of variable-pitch helical gears

Answer

A toroidal roller-based drive unit

Answer

An electronically controlled planetary gear set

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

A failing front wheel bearing

Answer

A worn engine mount

Answer

A blocked transmission cooler line

Question 6

What fault code category in ODIS/ElsaWin specifically covers S tronic mechatronic adaptation values that have exceeded their permissible range?

Accepted Answer

P17XX – Clutch adaptation limit exceeded (e.g., P1776, P1777)

Answer

P0700 – Transmission Control System (MIL Request)

Answer

P0730 – Incorrect gear ratio

Answer

P0720 – Output speed sensor malfunction

Question 7

When performing an Audi quattro rear differential oil service, which specification must be confirmed before selecting the correct lubricant?

Accepted Answer

Whether the rear differential is a standard open diff, a mechanical LSD, or an electronic differential (e.g., sport differential)

Answer

The vehicle's VIN prefix and MY only

Answer

The transmission fluid type used in the gearbox

Answer

The engine displacement to determine viscosity