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Old 08-15-2013, 12:03 PM   #1
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Aftermarket Auto trans cooling lines?

Noticed my lines were rusted a few weeks ago when replacing the radiator(the lines are the two smaller hoses that connect to the bottom of the radiator). Finally have drips on my frame and driver side LCA. I've studied up a bit, and it seems that they're a dealership-only part. I've seen a lot of people talk about replacing the rubber hose that is leaking at the crimp, but mine is completely rusted out and the whole line needs to be replaced. Is there anyplace I can order these for cheaper than the dealership? I keep hearing the price tag 100 being thrown around. And I'm not sure if that's one or both of the lines. And if I have to buy them from a dealer, I'm not completely sure how to? Go into my local jeep dealer and tell them what I need? Thanks!

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Old 08-15-2013, 12:59 PM   #2
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You can use 11/32" I.D. hose rated for high pressure and a couple of connectors made for the rubber hoses and do it yourself. You can also get metallic tubing and a bender (get extra to practice with) pretty cheap too, but if you don't use it a lot then it's kind of hard to justify the cost. Many auto repair shops can also bend new lines for you and it isn't too bad of an expense and they typically warrant their work.

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Old 08-15-2013, 01:42 PM   #3
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You can use 11/32" I.D. hose rated for high pressure and a couple of connectors made for the rubber hoses and do it yourself. You can also get metallic tubing and a bender (get extra to practice with) pretty cheap too, but if you don't use it a lot then it's kind of hard to justify the cost. Many auto repair shops can also bend new lines for you and it isn't too bad of an expense and they typically warrant their work.
I know the local auto parts store had the hose for 6 bucks. But what kind of metal tube and fittings would I use to connect to the rubber hose and the transmission? The fitting that is on there right now looks like it's a metal sleeve that slides on the inside and outside of the hose then crimps down. I haven't been able to look to see how the metal line connects to the transmission, or with what kind of fitting. Any suggestions? My jeep is my daily driver and I have a weekend off coming up so I'm looking to tackle it then.
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Old 08-16-2013, 12:19 AM   #4
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bump

After reading Mr Mac's post again, i'm wondering; is it possible for the lines to be all-rubber hose? I assume it was spliced into a metal line for a reason.
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Old 08-16-2013, 12:35 AM   #5
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You can use all rubber or rebend one from copper tubing then adapt the the fittings on the end.
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Old 08-18-2013, 09:38 AM   #6
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You can use all rubber or rebend one from copper tubing then adapt the the fittings on the end.
I've been fighting with the lines for the past two days trying to get them out without cutting. And it's making itself clear to me that getting new lines in there without disconnecting the transfercase shifter, exhaust manifold, and driveshaft will be next to impossible. so i'd like to use all rubber hose, but the only issue is that i'm worried the heat from the engine block and exhaust will damage the hose(the line runs between them).

Will i need to somehow heat-shield the lines? or is the rubber resistant enough to the heat?
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Old 08-18-2013, 12:34 PM   #7
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I would use Parker 919 hose which has a 450F rating with JIC ends. Then use JIC adaptors at the trans and radiator. You may need 45 degree or 90 degree adaptors, just make a good routing plan. Make sure that you secure the hose well. If you can run it down the frame. The factory routing is so that the engine/trans assembly can be put in as one piece. This is a very flexible thermoplastic hose with a stainless braid over it. Most hydraulic hose shops will have everything that you need in stock. Not the cheapest way to go, But one of the best.

The trans cooler is usually only 30-40psi of fluid pressure, so a low pressure hose (1200PSI) and hose clamps will work. If that is the way that you want to go. You may have leaking issues. Transmission fluid is very thin. I would recommend using Heat shrink hose clamps (Gates) to keep a good seal.

Just my opinion

Best of luck

Jeremy
ASE Master Auto Tech
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Old 08-18-2013, 12:37 PM   #8
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BTW If you order them from the dealer then make sure that you have the VIN number with you. That is how they will look up the part.

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