here is the problem i just got the flm ext tvps and the rear dogbone is wide at the ends, it's the same size as the 4 dogbones between the diff and wheels same length and the end are the same width. did they give me the wrong dog bone. i fixed the problem. i drilled out one of my old cheap diff cups and i drill out the dual brake cup that comes with the xl. for testing i put an old outboard dogbone. i put a small peace of fuel line in the diff cups so its a snug fit. is this problem normal.