Trans cooler line threads?

[usar17]

Done a few thread searches and reading and I'm having a hard time find an easy answer to this. I grabbed an Aux trans cooler out of a 1991 k2500 to install in my k20 that has a 1994 4l60e (same lines as any 700r4). I don't want to use rubber hoses for the fear of failures over time. Anyone have links or insights on where to get a nicer hose to go from the stock radiator outlet port to the aux inlet(I'll figure out the adapters for that side myself then). then back to connect to the stock return line. Most of what I've seen is people just cutting their OEM metal lines and hose clamping rubber into the system. I don't trust that haha.

Thanks

 

[74 Shortbed]

This should help.

https://www.summitracing.com/int/search/part-type/transmission-line-adapter-fittings

 

[usar17]

That should help going from the radiator to the aux cooler. What about from aux to cooler line?

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[74 Shortbed]

Super simple.

https://www.youtube.com/watch?v=l_Iw1kk_7jQ

 

[usar17]

didn't even think about cutting the existing and adding a new fitting

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[usar17]

What size is the line to get an fitting

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[74 Shortbed]

Cooler lines are 5/16".

 

[usar17]

Which is the return line? Top or bottom on radiator.

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[74 Shortbed]

Top..

 

[usar17]

Does it matter which direction the aux cooler flows?

Ei top to bottom or bottom to top. Ive seen diagrams either way so id assume not

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[74 Shortbed]

Either way works..