i have a 63 ford galaxie and it has an original 9 inch rear end i and i put discs on the rear and i had problems with the axles wobbling so therefore i couldnt use my disc brakes in the back i added new currie axles and it still does the same thing i tried it with just the tire mounted and the tire did the wobbling actions like it did with me just watching the rotors themselves could my housing be at fault and all the bearings and everything are new so if anybody could give me some helpful info on thisid appreciate it
if i wasnt sure the housing is straight try puting a level on the housing flanges turn it in a full 360 see if it stays level if the housing is bent or broke it should show up there.since everythings that old id fully strip it replace every bearing in it and rebuild or replace the 3rd member.