Originally Posted by Spooler

With a Quaife, if you lift one tire the diff will open up. That won't happen with a Wavetrac. Do some research on it. I have never had a problem with Z1. They have always been perfect with me. As anywhere that you get parts from, it is possible to get the wrong thing. Heck, I worked at a Nissan dealership as a technician. Parts guys would get confused and hand me the wrong parts from time to time. It's just part of modifying and working on cars.