I had this installed over the summer with my 3.73 gears. Long story short, why is it when I turn my one wheel one way, the other goes the opposite like an open diff? I know for a fact that I have 2 wheels spinning, trust me, I don't think I have to explain how I know. Is this normal for a torsen unit or is something broken?

 

Its normal, Jon.

You have what is referred to as a 'torque sensing' differential. The Torsen has a pair of worm gears that couple the spider gears together. When the pinion applies torque to the ring, the torque is transferred to both axles. It is very hard to transfer torque to only one axle, as the torque is divided between the two worm gears. However, if you apply torque to a WHEEL instead of the ring gear, the torque is transferred easily to the other wheel.

AN interesting note: The percentage of torque applied to the non-slipping wheel is a multiple of the torque applied to the slipping wheel. Thus, if you raise a slipping wheel in the air, there is virtually no torque being applied to the wheel: It just free-wheels. Since the non-slipping wheel gets a multiple of this torque, the multiple of zero equals zero. Your car wont move, it'll only spin the airborne wheel...until it starts to grab a little traction, that is!

 

I'm sure you found out by research in the local library