FAQ

Most aftermarket models are available right here through our webstore. Additionally, some are also retailed by outside distributors, including Ford Racing, Maximum Motorsports, Griggs Racing, & Frankland Racing Supply.

Unfortunately, no. We are not open to the public and do not offer tours of our facilities.

No. Most Torsen® models are considered non-serviceable and no parts are offered.

Torsen® differentials are manufactured for both OEM and aftermarket models. See our OEM application chart for vehicles that come with Torsen® from the factory. Otherwise, please visit our e-commerce store for current aftermarket offerings.

We are always keeping an eye open for new potential aftermarket applications. However, we must have a sound business case before investing resources into designing and tooling a new model. If you have a suggestion for an application, contact us and we will investigate it.

Yes, all aftermarket models for the 8.8 have the necessary grooves used by the snap-rings which retain the axle shafts in independent suspension systems. However, the OEM application Torsen® models used by Ford for the Ranger FX4 Level II, and then later the Mustang Boss 302 & Shelby GT500, do NOT have

Generally, this isn’t a choice that you have to worry about, as we only produce one per application. However, for some high performance applications, we offer the more aggressive T-2R model in addition to a standard Type-2. T-2R models have higher locking effect, with TBR in the range of 3:1 – 4:1, whereas the Type-2 models are typically in the 2:1 – 2.5:1 range. Which is better suited depends on how the vehicle will be used; autocrossers will normally prefer the T-2R, and daily drivers the Type-2, especially for winter use. People that are road racing or participating in open track events will have to decide based on the track they normally run at; larger tracks (open, fast and flowing) will probably favor the Type-2. Conversely, tracks that are short, tight and technical will probably require the T-2R.

Yes! Our model 975420-0207B is specifically designed for the modified Dana 35 axle that Ford used in the US-market Ranger (1998-2011), Mazda B-series (1998-2007), as well as Explorer/Mountaineer models from 1995 through 2001 (through 2003 for Explorer Sport & Sport Trac). This model is a direct replacement for the OEM open differential.

Torque Bias Ratio (TBR) is the term used to quantify the performance (or spin resistance) of a differential. It represents the maximum amount of torque split between the two differential outputs. If TBR is 2:1, the differential will allow up to two times as much torque to be sent to the wheel with better traction than to the other wheel. Also, it will resist one-wheel spin until one tire has more than two times the traction compared to the other one. At that point, the differential will allow spin, but will continue to send more torque to the side with better traction.

No, TBR is determined by the design and geometry of the gearing. Once it is established for a given application, it is fixed for that model. It may be possible to affect very minor changes with different lubricants (+/- 0.1:1), which is not likely enough to be able to feel while driving. Deviating from the oil recommended by the ring & pinion manufacturer also increases the risk of damaging said gears (see What Oil Should I Use?).

The OEM oil is what the axle system was tested – and proven - in by the manufacturer. Many other brands are well-regarded, with reputable products, but we have zero data as to what impact they'll have on performance or durability of the axle as a system. We would still recommend that you refer to you owner’s manual or the manufacturer of the ring & pinion gearing.