I have recently been looking at this product. I'm not sure if it is new or not, but i really like it. What it is is a selectable electric locking differential, and when it is unlocked, it is a limited slip instead of open. They look REALLY awsome. Only trouble is, they seem to be only making em for dana 60's and dana 44's, and not for stock toyota axles. They are about the same price (at places i've found them) as ARB's, but you don't need a compressor. If anyone can find anything for a toyota, please speak up. I'm afraid however, that we may have to wait for them. Here is a link to a site that has a little bit of info on them

http://www.tractech.com/Products.htm

 

Because of the way it's designed, it isn't likely that it will ever be available for Toyota 8" and 8¼" diffs (and Ford 9" for that matter) but may be available eventually for the 7½" front diff. The design requires a removable diff cover which the third-member style diffs obviously don't have.

 

Ahhh, i knew there would be a catch. I'm hopeful for the front then, but perhaps i will just go with ARB's anyway. Thank you for clearing that up.