Audi Audi S4 2009-2016 Drivetrain Specifications

The 2009-2016 Audi S4 features a quattro all-wheel-drive system with a longitudinally mounted engine. It is available with either a 6-speed manual transmission or a 7-speed dual-clutch S tronic transmission. The drivetrain is paired with a 3.0-liter supercharged V6 engine, producing 333 horsepower and 325 lb-ft of torque. The quattro system distributes power asymmetrically, with a default 40:60 split between front and rear axles, and can transfer up to 85% to the rear or 70% to the front as needed. The drivetrain is compatible with both gasoline engines and high-performance driving conditions.

Regular maintenance is essential for the longevity of the Audi S4 drivetrain. This includes oil changes every 5,000 to 7,500 miles, transmission fluid checks every 30,000 miles, and differential fluid replacement every 30,000 miles. Inspect the driveshaft and CV joints for wear every 15,000 miles.Additionally, ensure proper tire pressure and alignment to avoid uneven wear on drivetrain components. Follow the recommended schedule in the Audi service manual for optimal performance and reliability.

Replacing drivetrain components such as the differential or transfer case requires specialized tools and a lift. Start by disconnecting the battery and draining the fluid. Remove the relevant components, such as the driveshaft, and replace the faulty part. Reinstall in the reverse order, ensuring all bolts are torqued to factory specifications. Refill with the appropriate fluid and test the system for leaks or unusual noises. Consult a professional mechanic if unsure, as improper installation can lead to system failure.

Common drivetrain issues include vibrations, noises, or loss of traction. Start by inspecting for loose or worn components, such as CV joints or driveshaft couplers. Check fluid levels and condition, as low or contaminated fluid can cause malfunction. Use a scan tool to check for fault codes in the transmission control module or differential control unit. Address any codes by repairing or replacing faulty sensors or solenoids. If vibrations persist, balance the driveshaft or inspect tire alignment.

To optimize the performance of the Audi S4 drivetrain, ensure proper maintenance as outlined in the service manual. Upgrade to high-performance transmission and differential fluids for improved thermal stability. Consider aftermarket components such as lightweight driveshafts or high-strength CV joints for enhanced durability. Adjust driving habits to avoid excessive wear, such as aggressive acceleration or high-speed cornering. Finally, use performance-tuned software to optimize transmission shifting and torque distribution for improved acceleration and handling.