Well the Tcase is out and on my work bench. I have removed the front flange nut and am trying to remove the rear flange nut but am having no luck. I have tried my impact wrench and also have broken 2 wrenches trying to use a breaker bar with them. I have completely soaked it in wd40 and also hammered a small screwdriver down in the notch where you tap the nut. What the hell could it be. One more thing this nut has been removed before by someone else because there is the original tap which is past the groove and another tap where the groove is that looks like they beat the shit out it to make the tap.