Note: 

20 tooth ring differentials are typically for earlier model transmissions up to 2009. Please refer to this PDF before attempting to install the differential: Note on DSG parking brake toothed rings 

This differential minimizes wheel spin and provides superior traction by utilizing a proprietary torque biasing the design. The Wavetrac differential will improve your driving experience whether for daily driving, drag cars, or road race cars. Upgrading your differential cover includes increased strength, better heat dissipation, and reduced weight because of a smaller gear package. The internal gears are made from high-strength 9310 alloy steel and the diff cover a machined case-hardened steel billet with ARP® fasteners. upgrade your differential cover, including increased strength, better heat dissipation, and reduced weight. It can help provide increased performance.

What Does it Do:

Wavetrac® has designed a differential that eliminates the problem of loss of drive; or when one axle has zero loads to it such as in an extreme cornering situation.

How Does it work?

Precisely engineered wave profiles are placed on one side gear and its mating preload hub. As the two side gears rotate relative to each other, each wave surface climbs the other, causing them to move apart. Very quickly, this creates enough internal load within the Wavetrac® to STOP the zero axle-load condition. The zero axle-load condition is halted, and the drive torque is applied to the wheel on the ground (the gripping wheel) keeping the power down.

Why do you need it?

Do you have an Audi, BMW or Volkswagen producing significantly more power than stock? If so you would benefit from a Wavetrac unit in your car for added traction and stability under extreme conditions. On a road course, the Wavetrac unit will allow for power to be put down to the drive wheel instead of the wheel with the least amount of resistance. The same concept applies to drag racing enthusiasts where having both wheels putting down the power is the most effective way to leave the line.  

Differential Oil 

• Use Factory spec oil 
• DO NOT USE RedLine, Shockproof® or similar gear oils.
• Avoid gear oils with limited slip additives