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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.

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There are currently three types of Torsen differentials.

The original Torsen T-1 (Type A) uses crossed axis helical gears to increase internal friction. The Type I can be designed for higher torque bias ratios than the Type II, but typically has higher backlash and the potential for Noise, Vibration, and Harshness (NVH) issues, and requires a precise setup/installation.

The later Torsen T-2 (Type B) uses a parallel gear arrangement to achieve a similar effect. There is also a specialist application of the T-2, known as the T-2R (RaceMaster).

The latest Torsen T-3 (Type C) is a planetary type differential, in that the nominal torque split is not 50:50. The Type C is available as single or twin version; the Torsen twin C differential has front and center differential in the same unit.[2]

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