Have parted out several trucks over the years and there appears to be some inconsistancy regarding the rear frame crossmemebers. Most of the 2wd have a crossmember just behind the rear axel that is actually mounted about an inch off square in that one side is slightly forward then the other. I've seen this on both coil and leaf trucks in both 1/2ton and 3/4ton. Yet On others it is not there at all. It does not seem to be part of the 4x4 trucks. anyone have any answers as to what the deal is with this cattywhampass crossmember?