Hi I've been trying to replace the pitman arm on my gmc Sierra 2500hd for several days now. I'm using the moog 4 master spline pitman arm and no matter what I try it will not go any further on the steering box there is about a 1 inch gap between the pitman arm and the steering box. I know this has been discussed before but I cannot find anything to help with this problem. Any advice will be appreciated