http://www.powertrax.com/
Hey bobn ... their site is under construction, but they have a toll free number on there and an e-mail addy. They can probably help you more than we could. I have front & rear Lockrights now and the no-slip looks like a 1-up version of it. Hope this helps!
Bill

Sprungover`71 Jeepster w/lotsa goodies [img]/wwwthreads_images/icons/smile.gif[/img]