Transmission cooling lines

[Ronzxcvb]

One of my transmission cooling lines has a leak
Can I cut out the bad section and replace with a piece of fuel line?

 

[Big Mama]

I think most lines carry lower psi but how to seal up the patch? They’re not overly expensive to replace with new. What year model and engine?

 

[SnowDrifter]

The trans cooler is fairly low pressure. Under 40psi iirc.

That being said just replacing the lines isn't hard and that would be my suggested route

 

[Fless]

Not fuel line, the tranny fluid will eat right through that in a matter of weeks. I don't think that's a high pressure line, IIRC.

Mine have been replaced since the steering rubbed a hole through one, but now that one's lashed up out of the way.

 

[NoReverseYukon]

I bought new hard lines when I rebuilt my tranny. Getting those to go where they're supposed to was such a PITA that I used braided line instead. Not to mention those F-ing C-clips to secure them.

 

[Ronzxcvb]

Thanks for the help
I ordered some from Auto Zone they said would be in today. But when I went into town to pick them up now they wont be in until Tuesday and I need the truck on Saturday.
I put on a add on cooler years back that used rubber lines so thought I could just patch it up with some fuel line I have.

Not fuel line, the tranny fluid will eat right through that in a matter of weeks. I don't think that's a high pressure line, IIRC.

I'm glad I asked first.
kid found some about 40 min away so going to pick them up tomorrow.

 

[TheAutumnWind]

I bypassed the radiator on my trans cooler lines since ive added a larger trans cooler. Just cut out a section flared the ends and ran rubber hose.

 

[Rocket Man]

Fuel line is fine. It’s whats included in most aftermarket trans cooler kits including Tru-Cool. And it’s a low pressure system. Best to only use it temporarily though unless you add flares to the hard lines so the clamps work better.

 

[Fless]

Fuel line won't last when used as a tranny fluid line; it gets soft and deteriorates relatively quickly. Short term, it's probably fine, but for a lasting fix, no. Think @Tonyrodz may have experienced it, and I have.

 

[Rocket Man]

Now that I think about it, trans line is heavier than fuel line. And probably made from different stuff. I was wrong about Tru Cool, they use trans line.