Transmission cooler lines - JeepForum.com

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post #1 of 16 Old 01-27-2006, 12:41 PM Thread Starter
Blue56
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Transmission cooler lines

Anyone know what size the transmission cooler lines are on a 02 3.7. They come in on the passengers side of the radiator. Two fittings and rubber hoses connect to the lines coming forward from the transmission. I was wondering about the fitting size and / or the hose ID. Thanks.

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post #2 of 16 Old 01-27-2006, 02:02 PM
swyszomirski
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Take a look in the spec. part of the manual, could be there.

2004 Liberty (4x4) 5spd. - Rusty's air tube, light bar, front hitch with Mile Marker 8000, air horns, Megawarrior roof basket and fog lights. Sirius
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post #3 of 16 Old 01-31-2006, 08:48 AM
Ralphh
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Having just installed a trans cooler myself last week, On a '02 liberty with a 3.7. I can tell you the size of the tubing 3/8 O.D. You can buy trans cooler hose at the parts store just for trans cooler lines in this size, will easily slide over tubing on raditior and on the cooler itself.(it's cheap) The trans cooler line you want to use is the bottom one out of the raditior, that should go to the new cooler (top fitting if mounting horzonialy) and then take the bottom fitting from new cooler and run some hose and couple it back into the bottom hose the stock cooler was connected to. So, what I did was, use the stock cooler, and then run the slightly cooled trans fluid through the air cooled trans cooler to get even more cooling of the fluid. this is probably the best method to plumb one of these up. After you get this done, check your trans fluid level, I had to add about 1 1/2 pints of fluid to get it up to proper lever on the dipstick, I guess the cooler adds a little fluid capacity to the trans.
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post #4 of 16 Old 01-31-2006, 10:27 AM Thread Starter
Blue56
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Thanks for the reply. I was also thinking of adding a second trans filter and sensor for a trans temp guage. Hence the size question. I was wondering what size hose barbs to get for the filter mount.
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post #5 of 16 Old 01-31-2006, 11:30 AM
Ralphh
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The barbed hose coupling I used was 3/8" Which works perfect with the hose I bought, as it's marked, "Goodyear transmission cooler hose 3/8" So, I'm assuming that the barbed coupling is 3/8" O.D. and the hose is 3/8" I.D. Anyway, it worked out very well, no leaks, or real problems installing the cooler,
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post #6 of 16 Old 02-01-2006, 09:48 AM Thread Starter
Blue56
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Thanks! That will help a bunch!
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post #7 of 16 Old 02-17-2013, 02:20 PM
cowboyjack
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Quick question about the cooler lines. On my wife's 05 liberty one of the cooler lines is leaking by the radiator. it is leaking where the metal line meets the rubber line. There is a gap between the the two and when compared to the other line the other line does not have the gap. is there an o ring that came out or broke that caused the leak? is this a dealer only part?
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post #8 of 16 Old 02-19-2013, 08:45 AM
oldfamilyguy
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look in the wk forum and you will find the easy cheap repair for this common failure
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post #9 of 16 Old 02-19-2013, 09:05 AM
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post #10 of 16 Old 02-19-2013, 04:47 PM
cowboyjack
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Thanks!
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post #11 of 16 Old 03-29-2013, 09:25 AM
oldfamilyguy
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So same or similar? That gonna work for you? Hope so, pretty cheap and simple compared to replacing the whole thing.
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post #12 of 16 Old 01-21-2014, 02:48 PM
bbgg44
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I have a 2005 jeep liberty sport and the transmission line got a gap and separating between the metal line and the rubber line and I just worry can the metal line pop out of the rubber line one day? but they not leaking. all my years I never saw anything like it on transmission lines. has anyone had this problem? or any problem of metal line popping out of the rubber line. HELP.
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post #13 of 16 Old 03-06-2015, 07:19 AM
mandmfly15
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Anyone know what size the quick connect fitting is that goes into the transmission cooler. The line is 3/8 OD. They dont sell the connector alone trying to sell me the whole cooler.To me it looks like 3/8 also. Could I just use a compression fitting? Had the lines replaced and one fitting is leaking where it goes into the cooler. It is a 2005 liberty. 3.7 engine. Help have to get it fixed leaking pretty good.
butwhat likes this.
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post #14 of 16 Old 09-15-2016, 02:15 PM
butwhat
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CAn the fittings to the transmission and cooler be changed to AN or something to eliminate the clips?

2006 Jeep Liberty CRD
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post #15 of 16 Old 09-19-2016, 07:29 AM
zebulonsmith
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Getting ready to do this on the wife's '05. In my case, the steel line on the lower side of the trans cooler is rusted and leaking, but the rest looks very good. Can anyone think of a reason not to fork up $60 for the new assembly, grab some barbed fittings and extra hose and just patch things together?

I'd really like to avoid getting myself and the garage covered in ATF.
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