New trans cooler lines for the truck

The trans lines were leaking. I decided to replace the. They were cobbled together from scraps. They came out of the trans into a hardline, went to a high pressure hose, back to hard line then to low pressure rubber hose, then back to hardline and into the trans cooler. This was the same for the return line too except one side had a union.

I bent up my own. They do not follow the factory routing as I wanted them out of the way. I bent them to tuck over next to the frame rail. So far so good.

Here's one of the lines. 5/16 hard line. It was difficult to bend without having it collapse. I'm glad I finally bought a bender tool.


There was an annoying and loud ticking noise at highway speed that would get much louder when you got on the gas some. That ticking noise is now gone. I'm guessing it was the high pressure relief in the trans. The old lines had so much back pressure from all the junctions they just didn't function right: very scary.