SKU: 89590376405

Wavetrac® Limited Slip (Rear) Differential | 6-spd Audi B5 A4 | S4 and B6 | B7 A4 Quattro

Sale price$630.90 Regular price$701.00
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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30

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Description

Wavetrac® Limited Slip (Rear) Differential | 6-spd Audi B5 A4 | S4 and B6 | B7 A4 QuattroFITS: Audi B5 A4 S4 and B6 B7 A4 Quattro with 6 spd Transmission For All Wheel Drive cars only! REAR Differential The Wavetrac differential uses a patent pending design to improve grip in low traction conditions. Precisely engineered, converging diverging 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. This imparts

FITS: Audi B5 A4/S4 and B6/B7 A4 Quattro with 6-spd Transmission

For All Wheel Drive cars only! - REAR Differential


The Wavetrac differential uses a patent pending design to improve grip in low traction conditions. Precisely engineered, converging / diverging 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. This imparts an increased normal force through the side gears, increasing the bias ratio as a function of load. This increase occurs automatically only when conditions find it necessary, and it 'reverts' back to its nominal bias ratio quickly and seamlessly, maintaining optimal drivability and performance at all times. It's like having two differentials in one: you get the benefit of a higher bias ratio when needed without detriment to the car's handling.

Interchangeable Friction Plates Provide Controlled Bias

Here's somethonaling else you won't find in any other design:

The Wavetrac diff's behavior can be altered in the field to suit your needs. It comes standard with carbon-fiber bias plates for the best all around performance. Interchangeable plates using materials with different friction coefficients to fine-tune the bias ratio are sold separately.

These friction plates provide a mechanism to tune the response of the differential as a function of applied torque load. The applied torque load manifests itself as an axial load from the differential pinions into the housing. This axial force is then considered a normal force into the friction plate, and as a function of the effective coefficient of friction, will provide a resistive torque to the rotational motion of the differential pinions. The resistive torque will add to the resistance of relative rotation of all components within the differential. The resistive force, however, is non-uniform since it is a function of the axial load from the differential pinions. The unbalance of the resistive torque will manifest as non-uniform energy absorption within the differential causing a bias ratio.

Superior Design, Materials, and Construction

Designed from a clean sheet, the new Wavetrac Differential brings current gear technology to the market. Internally, its gear tooth forms are optimized for strength and improved oil film retention over competitive designs. Our gear package is smaller, reducing overall mass, yet is more durable. Attention was also paid to the side gear/axle interface, putting as much material thickness as possible in this critical area - most important when power levels get high.

Each Wavetrac Differential is crafted from the highest quality materials available. The internal gears are made from high strength 9310 alloy steel. The diff bodies are machined from case hardened steel billet. To complete the package, every Wavetrac differential is built exclusively using high quality, high strength fasteners from ARP, the world leader in fastener technology.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 89590376405

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Brianne Acklin
Bozeman, US
★★★★★ 3
Manufactured wrong
Double check the mounting holes BEFORE you assemble! I got the whole thing put together, and then realized the left side bracket was incorrectly manufactured- the mounting hole is on the front of the unit instead of the back, so I can’t actually hang it on the wall. The assembly was easy, though.
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Reviewed in the United States on April 24, 2026
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Sabreena Latham
Boise, US
★★★★★ 5
Love!!!!! GET IT!! It’s a steal
Absolutely LOVEEEEEE it! The LED light strip sucks though lol. It falls off. So we glued it…. 🤣 but it’s such a good shelf!! The lights look super cool on it! Easy to assemble. Great size. Perfect size.
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Reviewed in the United States on December 27, 2025
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Angela Benton
Houston, US
★★★★★ 5
Will buy again
Color: Walnut, Size: 2 Pack
Great color, hardwear was easy to install, quality great, very stable, all in great fit great size and love the look
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Reviewed in the United States on March 27, 2026
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Judy V.
Phoenix, US
★★★★★ 5
Good product at a reasonable price.
Color: Grey, Size: 2 Pack
The shelves were easy to install, are sturdy and look good.
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Reviewed in the United States on April 14, 2026
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Shelly Desrosiers
Lake Worth, US
★★★★★ 5
Highly recommend these shelves
Color: Black, Size: 2 Pack
Love these shelves! Easy to put up, stylish, well made and mounting hardware feels secure. Love the fine details of the included screws and anchors and small tabs to cover screws underneath.
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Reviewed in the United States on May 27, 2026

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