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Click on the hyperlinks below to retrieve articles about the Torsen differential.  A traction control article, published in 1988,  explains how the Torsen differential works!  Information and explanations of invex gearing (T-1 differential), bias ratios, the Torsen mathematical model and more are found in this article.  This article, as well as the Torsen technical sheets are published in Portable Document Format (PDF).  You will need Adobe's Acrobat Reader to view the documents...

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Download (Right mouse click on the hyperlink and select Save Target As... ) or view the The development of a differential for the improvement of traction control article and see how the Torsen T-1 (Type A) differential works!

Available from SAE (www.sae.org) is a Technical Paper on the Torsen T-2 titled The New Torsen II Traction Technology.  The number for this SAE Technical Paper is 940736.  This document is available for purchase through the SAE website.

Download or view the Torsen technical sheets.

Torsen differential products cover a wide range of torque biases and applications in the front, center, and rear of a vehicle!

T-1 (Type A)
This is the original differential that was introduced in the AM General HMMWV (Hummer®) and the Audi Quattro which has seen considerable growth in other worldwide applications.   This is our crossed axis helical (Invex™) higher torque bias differential.
 
T-2 (Type B)
This differential is only a few years old and adds a wide range of torque bias coverage for the Toyoda-Koki Automotive Torsen North America, Inc. product line.  This type of differential is referred to as our parallel axis helical (Equvex™) differential which was designed to accommodate Ford and GM C-Clip applications.
 
T-2R (RaceMaster)
The T-2R is a higher bias T-2 torque sensing parallel axis differential designed for the more performance minded driver.  The higher bias found in the T-2R, like the T-1, allows the transfer of more available torque to the wheel that can better use it.
 
T-3 (Type C)
The newest differential style of the Torsen product line.  The T-3 is currently offered in a single or Twin Differential configuration (The twin differential has an open differential surrounded by a Torsen differential!).  This versatile unit is ideally suited for center applications and is designed for those hard to package all wheel drive systems.  The design of the Type C allows for a torque split other than 50:50 with a majority of available torque designed to go to either the front or rear axle.
 

Page was last updated 11/27/2006.