Now I am thinking about the position of the 4speed, but that cannot really move from where it should be?. The only differnece I have made is I have fitted a plate from another 4speed, that connects the shifter to the linkage. ( could not find the one I had that came with the box)
Any ideas please?? I am sure I have done something obviously stupid

O, box shifts fine, I have done about 120 miles running ite engin in, no problems
Thanks!!