I'm designing the rear end of a vehicle that will be running CV axles that contain to CV joints. These joints have a certain amount of plunge built into them such that the shorten and lengthen as the rear wheel travels.

Is there a method of modeling these axles where I can set a max and min length for a line to simulate the plunge? I'm thinking that making sub assembly of parts that simulates this is my only way to do it, but I'd like to try and get away with doing it with a sketch.