I have to put those joints on that curve and make it go from one end to the other like a roller coaster. I can get it on the curve by making the curve the base for the splineIK but when it rounds the bend it slows down even though in the graph editor for the movement its a linear climb no curving.

Now is there another way for me to animate this without doing the splineIK option and still get it to round the cure like its supposed to? Im trying to make it so that it uses the curve as a motion path but it wont do that if i make the curve the base for the splineIK for the joints.