That whole contraption that translates the linear motion of the cable in the gear changing motion has a lot of places for wear. I did all I could to make it tighter as I worked on the IMS. This pin was loose and was maybe about 30% of the overall sloppiness:
It was moving about because the staking was now worn and not holding it. I restaked it and then threw a spot of weld on it. After dressing the weld it was immoveable.
The red arrows are the 4 ball/socket ends on the cable and the other linkage. This is where the rest of the wear and slop is occurring and unfortunately, are not replaceable. You need new cables which gives you new ends. I'm trying to find a way to re-crimp a heim type joint onto the ends to replace them. It's low priority as I'm still trying to get the Box on the road!!
So inspect you ends on the cables, lube them and look for a fix.