WaveTrac Differentials In Stock at Achtuning!

Posted on November 17, 2015 – 11:36 am

Enhanced No-Load Bias Ratio via its Wave Design Center Pack

One of the known shortcomings of a typical torque biasing differential is its loss of drive (behaving much like an open diff) under zero or near-zero torque conditions (for example, when there is ‘no-load’ applied through the drive-train, either at vehicle stationary and/or transition from engine driving vehicle to engine braking and back).

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 drive-ability 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 something 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.

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H&R Price Increase

Posted on November 26, 2014 – 10:00 am

H&R prices go up across the board as of December 1st, 2014. NOW is the time to take advantage of current low pricing. Plus, we have just about everything you need from them IN STOCK here at Achtuning.  Shop online or call our sales department: 425-895-0000.

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Hartmann Wheel Prices Going UP!

Posted on August 27, 2014 – 2:25 pm

Hartmann Wheel prices are going up for the first time in just over a DECADE as of September 1st, 2014… NOW is the time to buy! (Or pre-order for any incoming wheels from our next container arriving in the next few weeks.)  Call 425-895-0000 or begin shopping in our online store.

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APR Spring Sale!

Posted on March 24, 2013 – 12:00 pm

It’s that time of the year again!  APR has put just about EVERYTHING they offer ON SALE from now through April 28th!!  ECU upgrades, Carbonio intakes, RSC exhaust systems, fuel pumps, intercoolers, and even turbo kits!!  Shop online NOW here at Achtuning as we’ve stocked up our inventory to make sure we have it ALL IN STOCK!!

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Improving Your Online Shopping Experience

Posted on November 22, 2011 – 1:02 pm

H&R’s Trak+ wheel spacers are now featured in the ACHTUNING online catalog with ACTUAL pictures representing each Audi, Porsche, and VW spacer H&R has to offer, and WE STOCK THEM!! Click the link below to begin shopping for your H&R wheel spacers!!


Oh, and if you need help determining what size spacers to run, click here: http://trakplus.com/measure

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APR: 2011 ECU Software by March 1st

Posted on January 31, 2011 – 3:21 pm

APR has finally announced the debut of their 2011 model year specific ECU tunes for the 2.0T TSIs, and the 1st of March is when we can expect that release! As with the 2010 model year applications, ECU removal is needed to load the APR programming (1-hour labor, $95) and appointments must be scheduled. For any questions or concerns about APR programming, please don’t hesitate to contact us!


ACHTUN!NG Combo Deals

Posted on January 3, 2011 – 10:55 am

This is a friendly reminder to check back as we rotate through our “Combo Deals” on achtuning.com!

Once you click on the “online store” link from the home page you will be presented with several combo deals where you can take advantage of incredible savings when combining your purchases! For instance, our latest entry includes a $1000 gift certificate to spend at Achtuning when purchasing a StopTech Big Brake Kit!!

Check out some of our other combo deals, too!

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Posted on October 1, 2010 – 6:14 pm

Today is the last day to call in your orders to get the ACHTOBERFEST Sale pricing, but you can still place an online order until midnight Sunday to sneak in any last-minute items on sale! Hope you all have a safe and Happy Halloween weekend! Thank you for your continued support!!

For the entire month of October we will be offering sale prices on just about everything we carry. Click on the “online store” link above to begin your shopping experience at ACHTUN!NG.COM!!

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We Are Moving…

Posted on April 7, 2010 – 10:40 am

… To the other side of the parking lot.

We’re still going to be at the end of 91st off of Willows Road here in Redmond but we will be in a larger facility to better accommodate our very large inventory – 50% larger than our current location. The showroom will also be larger than our current one which will allow us to better display our products. It’s going to be a long, slow process to move into our new building and we’re going to need your help! So… as with any move, we present to you:

Just about any item we have on the shelf ready for pick-up or shipping will be quoted with sale pricing (if not already on sale) to help minimize the number of items we need to move into our new facility. If an item online at achtuning.com is not on sale and we have it on the shelf, contact us directly for a quote and take advantage of big savings!!

Questions? Post away! Or feel free to contact us directly…


APR Sale Time Again!!

Posted on March 19, 2010 – 9:42 am

It’s the beginning of Spring and we’re officially rolling out APR’s “Spring Into Power” Sale beginning Monday, March 22nd through Friday, April 30th! In addition to APR’s sale prices, we are offering FREE SHIPPING on select items. Click on the image below to be directed to the Achtuning.com online catalog to begin shopping right away! Expect immediate shipping for most of your APR orders from the largest stocking APR distributor in North America!!
Contact us directly or post up if you have any questions.

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