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Unread 05-03-2007, 11:14 AM   #1
hogzilla
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1994 YJ Wrangler 
 
Join Date: Aug 2006
Location: Vancouver
Posts: 223
Auto trans cooling line replacement.

I have a tf999 ( i think ) in a '94 auto and the ATF cooling line to the rad has a slow leak. I'm sick of adding a quart every month or so and sick of seeing that puddle in the parking spot grow. Would this solve my problems ? it says it's universal. Or would I be better off going to the stealership and getting oem lines.
I'm also planning on installing a transmission cooler as well.

Here's the "universal" kit for the lines : http://www.4wd.com/productdetails.aspx?pid=493804

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Unread 05-03-2007, 12:14 PM   #2
hogzilla
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BUMP.............. Anyone ?

Maybe I should have titled this one " 8.8 Question " Or " which 4" lift ? "
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Unread 05-03-2007, 12:32 PM   #3
EABiker
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Is the line rusted out or is it leaking at the fitting into the radiator? I have slipped and clamped fuel line over cut-off hardlines in the past with no problems. If you do cut the bad section out, use a tubing cutter, a saw will put shavings into the transmission.
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Unread 05-03-2007, 12:38 PM   #4
1 ton yj
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Go to your favorite house junk store like lowe's, home depot, ace or whatever and get some brass NPT to 3/8" hose barb fittings for the trans and your new cooler. Mount the cooler in front of your rad and use some 3/8 transmision cooler hose from Autozone to connect it all.

Bypass the trans heater in the radiator all together.
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Unread 05-03-2007, 12:50 PM   #5
nerf965
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Depending on where your leak is, I used this on my 88 yj and worked out well, just make sure your lines and on tight. This kit is easier to install then factory lines.
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Unread 05-03-2007, 01:55 PM   #6
hogzilla
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thanks for the repiles. The leak is at the connection from the soft line to the hard line. It seems to drip on something that's making it splash on everything.
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Unread 05-03-2007, 02:47 PM   #7
Jeeples
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Quote:
Originally Posted by hogzilla
thanks for the repiles. The leak is at the connection from the soft line to the hard line. It seems to drip on something that's making it splash on everything.

I had the exact same issue on my '94 as well. When I upgraded to a new trans cooler I decided to fix the problem at the same time.

I did what was mentioned earlier, I took some 3/8" hose (in my case I used power steering hose as it's a bit heavier duty) and cut off the factory line right behind the metal to rubber crimp. I used a small pipe cutter, but I believe most flaring kits include a cutter as well.

If you would like I can try and snag a couple pictures as I need to crawl under the Jeep today to lengthen my CAD vac. lines and swap my speedo gear.
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Unread 05-03-2007, 02:51 PM   #8
hogzilla
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Like it ? I would Love it I'll be glad to finally take care of this. It's been pestering me for months now. Thanks a lot !
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Unread 05-03-2007, 04:47 PM   #9
Jeeples
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Ok, here's what I did:

In this picture you can see the feed line going into the radiator cooler, I decided to run my trans cooler inline with the factory one. Acording to Hayden this will provide the most cooling:



Here you can see I ran the hose out of the factory cooler and into the Hayden unit, you can also see that my return line is leaking, which I need to fix here shortly as well:



Here is the return line coming from the Hayden cooler and connecting to the factory hardline:



Unfortunately I cannot remember if the brass fittings came with my Hayden kit or if I had to find them in bulk. Also, I have started switching over to bulk power steering hose instead of fuel hose. The reason for this is a higher pressure rating and it seems to withstand the elements a bit better before it starts getting spongy and soft feeling.

You might also want to put a small flare on the end of the factory hard lines to help prevent leaking, but this is not required. Also, stay away from regular hose clamps and they tend to bite into the hose and damage it. As you can see I have yet to swap mine over to the "Fuel Injection" style of hose clamp.

Feel free to shoot me some more questions if you have any!
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Unread 05-03-2007, 06:06 PM   #10
Burnerman
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1989 YJ Wrangler 
 
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I bought oil cooler hose at the local aut parts store and double clamped those lines. My hard lines were very rusted and when I replaced the seal and filter in my trans I bought 2- 5/16" x 48" brake lines for $20. I cut the double flare off 1 end slid the brake line fittings off and removed my old hard lines. I cut the 5/16" flare nut off the old lines slid them on teh new ones and bent them to match. worked like a charm. Make sure that you get rubber trans cooler line and not fuel line. The trans lines can handle the fluid, heat and pressure.
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