you might find when you remove the shift tower that the 'ears' that contact the shift lever ball have bent a little over time. this results in the transmission not coming out of a particular gear when the shifter is in neutral. i simply use a small vise grip to rebend the ears back to original shape.
lets see... then you only need the 1/2 wrench, gasket, and vise grip.
CaseIH gasket part # 351-546-R1
of course, a little finesse and less force on the shifter is a good idea. you can't force square cut gears to mesh.