Check that it is the correct arm/shaft combination. There are 2 different sizes. I can't say exactly when or where the change occurred. I know for sure the power steering gears are of 2 sizes. The manual gear is the one I'm not sure of. All the smaller or some of both out there?
Then you're not attempting to move a arm from one box to another are you? Anyway...
Best way to tell is the hex nut size. If one is 1&1/8 hex and the other is 1&5/16 hex, the 2 tapers are different sizes. I think the wrong smaller arm might go part ways onto the larger taper shaft but it wont work, wont go all the way on.
