Wavetrac Differential - Audi DQ500 - TTRS RS3 DSG Quattro FRONT - Ecotune

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- Innovative:
The patented Wavetrac design automatically improves traction in low-grip conditions. This feature is an innovation and unlike any other torque biasing differential design.

- Superior Materials:
9310 steel gears run in case-hardened forged or billet steel bodies. ARP fastening hardware used throughout.

- Maintenance Free:
The Wavetrac differential will perform a lifetime of service with no maintenance or rebuilds.

To best understand how the Wavetrac is truly different from the other gear differentials on the market, you first have to understand the primary problem that the Wavetrac solves.

The problem: Loss of drive during zero or near-zero axle-load conditions.

Zero axle-load is a condition that occurs during normal driving, but creates the most noticeable problems when driving in extreme conditions. Zero or near-zero axle-load is the condition that exists when there is "åno-load" applied through the drivetrain, when one drive wheel is nearly or completely lifted (often in aggressive cornering). It also occurs during the transition from engine driving a vehicle to engine braking and back, even with both drive wheels firmly on the ground.

Here"s how that loss of drive hurts you:

1) If you lift a wheel, all gear diffs except Wavetrac, will NOT power the other wheel.

2) During the transition from accel to decel, all gear diffs except Wavetrac, do nothing.

Why does this happen?

All gear LSDs (including Torsen, Truetracåâ, Quaife, Peloquin, OBX, etc.) work in basically the same manner: they divide the drive torque between the two axles, applying drive to each side, up to the available grip of each tire. The amount of drive torque one wheel can get over the other is described as the bias ratio, a measure of the torque split across the axle.

Standard, open differentials have a bias ratio of 1:1. They can only apply as much drive torque as there is available traction at one wheel. When one wheel loses grip, the total available drive is lost as well (at a 1:1 ratio). All your power goes out the slipping wheel - along the path of least resistance.

Torque biasing differentials offer increased bias ratios over open differentials. For example, if a diff has a bias ratio of 2.5:1, then it can apply drive torque to the wheel with the most traction (gripping wheel) at 2.5 times the traction limit of the wheel with the least traction (slipping wheel). This is a significant improvement over an open diff most of the time.

The problem is that when one tire has LITTLE or NO grip (zero axle-load), the other wheel gets ZERO DRIVE, because (basic math here): 2.5 x 0 = 0.

Lift a wheel (or substantially unload a wheel) and you get zero axle-load on that side - that means that during the time the wheel is unloaded, the typical diff will NOT power the wheel that"s still on the ground. No matter how high the bias ratio, you get no power to the ground.

During the transition from accel to decel, where you have near zero torque on the axle, even if the wheels are on the ground, the typical diff is unable to begin applying drive torque until AFTER the zero torque condition is over. While this condition is generally short-lived, the fact that most diffs can do nothing during that time means that there will be a delay once the zero torque condition stops - creating a reaction time in the driveline.

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Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

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Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Ecotune do not assume responsibility for the use of this part on public roads in the UK or abroad where emissions controls have been removed. It is the customer’s responsibility to ensure compliance with the rules and laws of the area of use. We would like to advise that it is illegal to remove any emission control devices or increase the exhaust noise limit on vehicles permitted to drive on public roads in the UK and most other countries around the world. Please check the rules and laws relating to this in your country. Any parts supplied or work carried out by Ecotune are strictly for off-road use and may fail an MOT test. This means that we cannot accept any responsibility for vehicles being driven on public roads where removal of emission control devices is prohibited. If you carry out this work at our premises, we would not be able to road test afterwards..