I have been on the website and I have talked to a rep. They don't list anything on the website, and the person I spoke with basically said they really don't make anything for toyotas newer then 1989.
Blackdiamond....
An LSD with friction plates in a "clutch pack" would be have a directional bias. That is part of the design to make it disengage when you coast/easy off the throttle.
https://youtu.be/AiuH-FeC-Ho A Torson LSD uses a combination of worm wheels and worm gears. It has no directional bias, and only locks if the wheels on either side of the diff exceed a set ratio. Here is how they work.
https://youtu.be/JEiSTzK-A2AThe trutrac is a torson style diff with a slightly different design, and looks to have a small amount of bias.
https://youtu.be/lZmsY2YvVscBut having said that, you can select the directional bias in the gear set. By flipping the gears( changes the bias) you can set the truetrac to be used in the rear or in the front.
https://youtu.be/TPBdbGO0-fENow I can run the rear diff up front without flipping the gears, because it works just as well in reverse as it does going forward.
https://youtu.be/s4OYbf3MW20But it is kind of like running a ring and pinion backwards. So since the gears can be reconfigured to make a front diff out of a rear diff, why not set it up correctly.