ORIGINAL: Scouser
I don't have the metal brake disc but a brake pad has to have a metal backing, if the new brake pads don't come with one already stuck to them, you would need to put the original metal brake pads back on.
Have you looked at the linkage for the possible cause? If the brake disc you are replacing was worn, I should think you would have had to adjust the linkage as the effectiveness diminished with age. Now you have a new pad and plug, the original tension is back and that is what is causing the brakes to rub. I have had alot of trouble setting mine up in the past so I know how frustrating it can be, stick with it though and let us know how you get on.
Thanks Scouser. I was thinking that I needed a metal backing for the pads in order for everything to work properly. The pads bind with the linkage completely off. When I have the rear diff off, and only the top bracket bolted to the brake seat and diff, everything turns freely. When I bolt it all to the chassis, it binds up on me even if the drive shaft is not connected.
I am going to just pull the rear diff back off after the kids settle down.