I think i may have found my answer but i would rather confirm here. Recently did a bunch of stuff to the car and the center diff being one of them. Ive noticed in my limited driving so far that on very slow and turning the wheel alot in corners i get repeated thudding noise and feeling.
Is this due to the mod being done? I think i read somewhere that JHM removes something in the diff (teflon?) and because of this at low speeds when turning hard this is something you have to deal with now. Its not a big deal at all for me, but before i send my diff back and get my core refunded i wanted to make sure we installed this right AND it was working correctly. Its almost like when the quattro system kicks in but now its much more pronounced then before. Thanks guys.