Transmission line question

[Johnl48]

I ran my own transmission lines from Trans along frame, thru radiator support to a cooler mounted on front of radiator, bypassing radiator (as directed by my transmission guy)
My concern us there is nowhere where these lines can flex. Unlike fuel lines that have rubber hoses from frame to engine. I am concerned they will crack over time. Im Thinking of switching them to the inline tube kit that uses the steel braided flexible lines, or am I thinking too much ??