Hi there, I have a trucktor tandem axle assy. from the back of the cab, it is all there, there is a plate riveted on the back of the tag axle. It has the 8 rims and tires still on the assy. I have pictures of the set up if you would like to see them, it is like Spanky says, the aftermarket frame just slips over the original frame rails, mine has the chain set equalizer with the sprocket in the middle. This came off a 1948 Chev. truck with a long wheel base. Thanks, Harold in Penna. my number is 610-767-8370 if needed.