The unions that you have attached to those 90 degree fittings will not work..
, they don't make a union fitting that will adapt to the factory transmission cooler line fittings..
The problem is, the factory transmission cooler line fittings have an extension on them..
You can see it here:
That's to allow it to fit inside these radiator fittings:
Maybe you can find some union fittings that are extra deep..I've personally never seen them though..