Any Cobras built with open diff?

[cycleguy55]

Originally Posted by eschaider

For those of you who might not remember (or were not alive then) the torque biasing diff was invented for F-1. It was the original intellectual property of a crafty Brit named Quaife. The differential took on his name and the Quaife design. The Quaife torque biasing diffs were only available from Quaife until his patent ran out. Today there are umpteen different firms that produce a "Quaife design" differential, the largest firm being Eaton.

The design uses a myriad of pinions and driving / driven gearing to do it's magic. As Morris has already said the torque biasing design works better than the alternatives available today.

Here is a link to the Eaton TruTrac website, click here => Eaton TruTrac where they describe their version of the differential. There is also a video under the Performance section of their web page that gives a better explanation and illustration of the technology.

As I suggested, there are many providers of the torque biasing differential available today. Probably the premier provider is a company named Wavetrac. They have actually done some additional design engineering to improve the operation of the differential. Eaton uses six pinions in the design of their unit and Wavetrac uses 12 pinions in addition to a very innovative patented design enhancement to address a special situation that only occurs on torque biased diffs, where there can be a loss of drive during zero or near-zero axle-load conditions. In addition to the stronger, enhanced design, Wavetrac is the only manufacturer that offers a transferrable lifetime warranty on their unit — no matter where you use it including on a race tracK. Here is the link to their site => Wavetrac Torque Biasing Diff

The Wavetrac units use 9310 nickel steel for the internals like Pro-Series 9" Ford ring and pinions. The cases are either forged steel or CNC manufactured billet steel. It is a very nice differential — with a transferrable lifetime warranty. The clarity in the wording of their warranty provides a level of comfort that warranty wording usually does not.

This is how they phrase it:

"Autotech Driveline warrants each new Wavetrac® Differential against defects in manufacture, material, workmanship, and wear-out when used in the vehicle application for which it was originally designed, on any motor vehicle, under any and all operating conditions, including racing, (emphasis mine) for as long as the original purchaser or any subsequent purchaser owns the differential."

Rather all inclusive ...


Ed

I'm running the POWERTRAX® Grip Pro - one of the many helical gear, torque sensing / torque biasing differentials you noted above. Like Eaton's TruTrac, this is a six gear system and, while it doesn't have the Wavetrac innovations that deal with zero or near-zero traction for one drive wheel, I don't see that as a limitation in my application. No lifetime warranty, but mine has performed flawlessly since it was installed.

https://www.powertrax.com/product-in...action-system/