cosmos problems with splines

I am trying to run an annalysis on a transfer case that i have designed but
i am having issues with the transmission of the forces through one of the
splines. It only is showing that one of the spline contact surfaces is
carrying all of the force which leads to failure. what is the best way to
get around this? As it is i am using a contact set that was created by
selecting both parts and letting cosmos generate it. Thanks for any help.

 

Ok realized what i did wrong, I had only defined one of the surfaces of the
spline for the contact gap set. Now with all selected it is working as I
expected.

 

Why?

What are you trying to learn?

 

looks like a previous post did not make it to the server. I did figure out
what the problem was. When I defined the gap and spacing between the two
parts I thought by selected the appropriate mates in the side bar was all
that was needed. Instead just the one surface was linked causing the issue
that all the force was being transmitted through a single spline. Thanks
for reading though and trying to help me out.