Wavetrac Rear Differential 01R B5 B6 B7 Audi A4 S4 Quattro & B5 RS4

Fitment

• Audi Rear A4, S4, RS4 (B5) Quattro
• Audi Rear A4, S4 (B6/B7) Quattro (excludes B7 RS4)

Note: Includes bearing spacer for the small-end side of the differential—only required on certain models.

Product Overview
Wavetrac® differentials are state-of-the-art helical gear units designed, developed, and manufactured in the USA by Autotech Driveline. The Wavetrac® Audi A4 & S4 Quattro Differential is the only torque biasing differential on the market featuring patent-pending technology that actively mitigates wheelspin during unloaded wheel conditions.

When axle load drops to zero, the Wavetrac® cam mechanism generates internal load, maintaining drive to the gripping wheel—unlike conventional torque biasing diffs that behave like open differentials in such scenarios.

Each unit is built with ultra-strong 9310 alloy steel gears housed in case-hardened steel bodies and secured with ARP® fasteners. All Wavetrac® rear differentials include a transferable Limited Lifetime Warranty.