Vibration problem

Supershafts said
You have to know what series joint you have and then measure the yoke and see, you either have 2.125" or 2.625" wide at the inside of the yoke where the joint sits.

Then see which joint you have, again measured at the clips on the outside edge which are on the joint

So as long as the yoke and joint are the same series, it does not matter which yoke is used, is that correct? And if they do match, then I will need to check the preload on the pinion? does that make sence?