Sure, the Torsen diff uses helical gears that when under load bind up due to the side thrust of the gears. This binding generates friction linear to the amount of load on each wheel. They are fast acting diffs but are smooth in action. The friction during lockup is proportional to the load applied whereas something like a Salisbury diff, (Plate Clutch type)is generally non linear to the load applied. The primary difference between a type 1 and type 2 Torsen is the later has preload in it. It still will not provide a traction increase much above what the preload is with a wheel off the ground.

The Torsen diff Kevin has would have been made by Gleason in the mid 80s, many were made but few survived. They did not have the materials and heat treat right, Unfortunate part of pioneering. There were a few later ones that lasted and maybe Kevin's is from the later production. But by then they were loosing the OEM contracts and were in financial difficulties. I have both a Mazda and a Honda Torsen diff in some cars and they are nice to drive. They are really suited well for a front axle application due to the linear lockup under load. Both of mine are in rear drive cars though. They are not an off road diff due to the fact they want both feet on the ground.