I have a 2002 GTI with a broken steering arm. How do I get the large nut surrounding the arm/shaft coming out the back of the unit off. I have removed reverse shield, pump shroud and still can not get a wrench in there. Do I need to remove the next layer and what are precautions. If I remove the housing that is bolted to the body (holds the pump) I could get to the steering rod nut but I have never had that housing off. Any warnings about removing that housing ? Advice please. I do not have a shop manual.