Here's a fun story: I changed out my radiator in preparation for moab. Not the transmission soft lines that connect to it. Few hours down the road I'm almost to the top of a pass, and guess what blows? That's right, the soft lines, which were at the end of life and the movement to disconnect and reconnect then was the last straw.
Wanna know what happened when they blew? All that A/T oil covered the hood, roof, and hatch of the car. A year later all the paint that was coated in oil was gone and the whole truck needed a paint job.
Here's what everyone should learn: don't even think of replacing the radiator and leaving the squishy tranny lines
Same thing happened to my dad on our way out to King of the Hammers in the desert. Luckily I was behind him and noticed the fluid spraying the road and stopped before any potential damage.