AUDI Transmission & Drivetrain Systems 1 — Questions and Answers
Question 1: What does the term 'S tronic' refer to in Audi vehicles?
- A continuously variable transmission (CVT)
- Audi's dual-clutch automated transmission (Correct answer)
- A six-speed manual transmission
- A torque-converter automatic transmission
Correct answer: Audi's dual-clutch automated transmission
S tronic is Audi's marketing name for its dual-clutch transmission (DCT), which uses two separate clutch packs for odd and even gears to enable fast, smooth gear changes.
Question 2: Which component in the Audi quattro permanent all-wheel drive system distributes torque between the front and rear axles in most longitudinal quattro applications?
- Haldex multi-plate clutch
- Torsen torque-sensing differential (Correct answer)
- Electronic limited-slip differential
- Open center differential
Correct answer: Torsen torque-sensing differential
Most longitudinal-engine Audi quattro vehicles use a Torsen (torque-sensing) center differential, which mechanically apportions torque based on traction demands without electronic intervention.
Question 3: In an Audi S tronic (DL501) 7-speed transmission, what is the primary function of the mechatronic unit?
- It lubricates the clutch packs with hydraulic fluid
- It controls all hydraulic and electronic functions of the transmission (Correct answer)
- It converts engine torque to electrical energy for the hybrid system
- It mechanically locks the torque converter during highway driving
Correct answer: It controls all hydraulic and electronic functions of the transmission
The mechatronic unit integrates the transmission control module (TCM) and hydraulic control body into one assembly, governing clutch engagement, gear selection, and solenoid operation.
Question 4: What fluid type is specified for most Audi S tronic dual-clutch transmissions?
- Standard ATF Dexron VI
- Engine oil 5W-40
- Audi/VW G 052 182 dual-clutch transmission fluid (Correct answer)
- Power steering fluid CHF 11S
Correct answer: Audi/VW G 052 182 dual-clutch transmission fluid
Audi S tronic transmissions require the specific dual-clutch fluid G 052 182 (or its approved equivalent) to properly lubricate the wet clutch packs and maintain correct friction coefficients.
Question 5: On a longitudinal-engine Audi with quattro, the rear differential receives power via which component?
- A front-mounted transfer case connected by a prop shaft
- A transaxle mounted directly at the rear axle
- A longitudinal prop shaft running to the rear final drive (Correct answer)
- A chain-driven secondary output shaft
Correct answer: A longitudinal prop shaft running to the rear final drive
In longitudinal quattro layouts, a prop shaft (driveshaft) runs from the transmission/transfer case rearward to the rear final drive unit, delivering torque to the rear wheels.
Question 6: What is the purpose of transmission adaptation (also called clutch adaptation) performed by ODIS on an Audi S tronic?
- It recalibrates the ABS wheel speed sensors
- It resets kiss-point values so clutch engagement is smooth and precise (Correct answer)
- It updates the transmission software to the latest version
- It bleeds air from the hydraulic lines
Correct answer: It resets kiss-point values so clutch engagement is smooth and precise
Clutch adaptation resets the kiss-point (touch-point) data stored in the mechatronic unit so the TCM learns the exact engagement point of each clutch pack, preventing shudder or harsh shifts.
Question 7: Which Audi quattro system variant uses a Haldex-style electronically controlled multi-plate clutch on the rear axle rather than a Torsen center differential?
- Longitudinal V8 quattro (e.g., A8)
- Transverse-engine quattro (e.g., A3, TT on MQB platform) (Correct answer)
- All RS models with carbon ceramic brakes
- All Audi models built after 2020
Correct answer: Transverse-engine quattro (e.g., A3, TT on MQB platform)
Transverse-engine Audi models (built on platforms like MQB) use an electronically controlled multi-plate coupling on the rear axle (similar to Haldex) rather than the Torsen center diff used in longitudinal layouts.
AUDI Transmission & Drivetrain Systems 1
What does the term 'S tronic' refer to in Audi vehicles?