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Old 11-22-2014, 10:37 AM
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DIY: Transmission Oil Cooler Line Repair

Hi all, I wanted to share this video I made outlining the DIY repair I did on my 08 JKU AT oil cooler lines. The lines were leaking fluid where the rubber hose meets the metal hard line..at the crimp on clamps to be exact. It really wasn't that much fluid but it was still making me paranoid so I dabbled into a DIY idea to try to save some time and effort of replacing both the entire lines. It seems to be working out pretty well so far. Hope you enjoy!


https://www.youtube.com/watch?v=Grv7...GnpBLiyCA0uKPg

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Old 03-29-2015, 04:33 PM   #2
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How has this repair been holding up? Other videos I watched cut the line and flare it. Your idea seems far easier and faster since the lines stay on the Jeep.

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Old 03-29-2015, 10:37 PM
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Still doing good..I was under the jeep the other day and still dry!
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Old 03-30-2015, 10:19 AM   #4
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I like your solution but I wonder if I should flare the end a bit for more gripping power. I can just see that thing slipping off on top of some 13,000 foot mountain pass with my luck.
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Old 03-30-2015, 02:06 PM
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Lol well it surely couldnt hurt to flare them i guess
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Old 03-31-2015, 11:55 AM   #6
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Do you think the hose would go over the lip for the old clamp? That would add more holding power and reduce leak potentials.
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Old 03-31-2015, 01:52 PM   #7
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Thanks for the video. I need to do this to my 2010 JKU. My hoses are doing the same thing.
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Old 03-31-2015, 11:05 PM
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Quote:
Originally Posted by kenb1023 View Post
Do you think the hose would go over the lip for the old clamp? That would add more holding power and reduce leak potentials.
It might..you may have to put some power behind it to get it to slip on there but it will be tight i'm sure
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Old 04-01-2015, 11:44 AM   #9
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I did this same repair to my XJ more than 10 years ago without flaring and it is still holding together.
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Old 04-01-2015, 11:59 AM   #10
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Quote:
Originally Posted by wheels082 View Post
I did this same repair to my XJ more than 10 years ago without flaring and it is still holding together.
Well that's a good track record. Thanks for sharing
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Old 04-01-2015, 05:34 PM   #11
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Originally Posted by kenb1023 View Post
I like your solution but I wonder if I should flare the end a bit for more gripping power. I can just see that thing slipping off on top of some 13,000 foot mountain pass with my luck.
You could always double hose clamp at both ends if you are worried about it coming off. I suffer the same paranoia and double clamped the hoses to my over sized trans cooler in my truck. No problems so far.
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Old 04-06-2015, 12:52 PM   #12
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Well I got it done. Double clamped it. My flare tool is a POS and would not give me a bubble at the end I couldn't get it to go over the back clamp lip because it was to sharp an angle and would not slip over it. If I had a machine shop I would make a flare fitting that would slide over the existing line to give that ramp for the hose to go over. Maybe a good invention to work on. I used Fuel Injection Hose clamps and cranked down on them as far as I could. While I was at it I pumped out about 3.5 Qts of the old ATF out the line while it was off and refilled with fresh. Dark color but did not have a burnt smell. When I go in to have the filter changed I will have close to 75% fresh ATF in there. Took her for a test drive, no leaks and seems to shift better already with the fresh ATF. Will keep checking it to make sure I don't get any leaks. New B&M Oil cooler should be here this week as well.

Thanks for all the help and this great fix for the leaky line.
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Old 04-06-2015, 05:47 PM   #13
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This is how mine looks. Hope it holds
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Old 04-07-2015, 06:47 AM
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That's awesome!! Glad to see you went after it, I'm sure you will be just fine with those clamps
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Old 04-07-2015, 10:31 AM   #15
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That's awesome!! Glad to see you went after it, I'm sure you will be just fine with those clamps
Time will tell. I didn't touch the other line as it wasn't leaking. Don't fix it if it isn't broke philosophy. Oil cooler goes in this weekend.
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Old 04-07-2015, 10:35 AM   #16
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Mine is seeping. I'm not going to touch it until it gets worse.
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Old 04-07-2015, 11:11 AM   #17
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Mine is seeping. I'm not going to touch it until it gets worse.
It does not take long from a seep to full leak. Mine started seeping about four months ago. When I replaced it I was getting full size drops. From what i understand the outside compound breaks down from the ATF because it is a different make up from the inside.
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Old 04-09-2015, 12:50 PM   #18
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Mine is doing the same. It seems like its only happening from the Top ( Return tube) I see drops from time to time so this w/e it will be my turn to replace.
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Old 04-21-2015, 04:15 PM   #19
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Well after some hard wheeling it started to leak. Just dampness coming from the cooler side it appears but enough to get the hose wet. I am going to try it again but use 11/32 hose instead of 3/8 hose. I hope the tighter fit will be all it needs.
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Old 04-21-2015, 05:00 PM   #20
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Well after some hard wheeling it started to leak. Just dampness coming from the cooler side it appears but enough to get the hose wet. I am going to try it again but use 11/32 hose instead of 3/8 hose. I hope the tighter fit will be all it needs.
Strange, maybe the hose clamps you used? I used some HD worm clamps with no problems. You are using hose specifically designed for automatic transmissions too right?
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Old 04-21-2015, 05:25 PM   #21
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The hose is for ATF and HP Power Steering lines. The 11/32 hose I have (From the cooler kit) is strickly for ATF cooling lines. I will also try conventional worm screw clamps.
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Old 05-04-2015, 02:06 PM   #22
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I put 800 miles of highway driving on it and no leaks. Looks like I got it done. It is amazing how much cooler the outlet of the B&M ATF cooler is compared to the inlet. Was not expecting that much of a drop that I can feel it with my hands. Money and time well spent.
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Old 01-06-2016, 10:47 PM   #23
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Thanks for the video Schitbrick3633 ! ... I replaced my lower hose using this method just today... and like kenb1023, used this opportunity to pump out and replace 4 more qts of ATF+4 since I already did a pan drop with filter and fluid replacement a couple of months ago when I got this Jeep...
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Old 12-12-2017, 02:49 PM   #24
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How’s it working?

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Originally Posted by kenb1023 View Post
The hose is for ATF and HP Power Steering lines. The 11/32 hose I have (From the cooler kit) is strickly for ATF cooling lines. I will also try conventional worm screw clamps.
Did you wind up using the 11/32” hose with FI clamps, how’s it holding up?
Thanks in advance.
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Old 03-24-2018, 03:08 AM   #25
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Hi all, was going to change an ATF fluid in my TJ today, and found my transmission oil cooling lines seeping at the hose-n-metal tubing connection area. Done some search and found this video offering a cost effective and reliable solution: https://www.youtube.com/watch?v=iNDk42GszDE
Viewer Discretion Advised (some strong language, lol)

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