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Transmission cooler lines
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=80356		 Page 1 of 1
Author:  2007mega [ Tue Oct 07, 2014 8:12 am ]
Post subject:  Transmission cooler lines
Anybody change theirs. Mine started leaking.. PN ?
Author:  jeepdan [ Tue Oct 07, 2014 4:18 pm ]
Post subject:  Re: Transmission cooler lines
2007mega wrote:
Anybody change theirs. Mine started leaking.. PN ?

Where are they leaking?
If the leaks are where the rubber hose sections clamp to the steel lines, the rubber hose can be replaced.
Which brings up another question. I can't find replacement transmission cooler hose that will hold up longer than a year. Anything better out there?
Author:  papaindigo [ Wed Oct 08, 2014 10:46 am ]
Post subject:  Re: Transmission cooler lines
If they are leaking where the quick disconnect attach to the cooler I believer there are repair kits.

jeepdan - not to be difficult but are you sure what you are getting is top rated transmission hose. I ask because often the cheap auto parts places are not all that up on hoses so they might be selling you 1) heater hose which won't do at all; 2) fuel hose but the cheaper versions that I've seen die by cracking when used with gasoline in like a year; 3) marine grade all fuel rated fuel line which might work and is the minimum one should use as fuel line; or 4) transmission hose (I would be sure to only purchase name brand not house brand).
Author:  thermorex [ Wed Oct 08, 2014 12:16 pm ]
Post subject:  Re: Transmission cooler lines
My transmission hoses that I replaced are all transmission Napa hoses uscg rated (us coast Guard, aka marine) and I haven't had an issue with them. I think the Mercedes 300sd has gates, also from napa and seems to be fine so far.
Author:  jeepdan [ Wed Oct 08, 2014 4:40 pm ]
Post subject:  Re: Transmission cooler lines
papaindigo wrote:
If they are leaking where the quick disconnect attach to the cooler I believer there are repair kits.

jeepdan - not to be difficult but are you sure what you are getting is top rated transmission hose. I ask because often the cheap auto parts places are not all that up on hoses so they might be selling you 1) heater hose which won't do at all; 2) fuel hose but the cheaper versions that I've seen die by cracking when used with gasoline in like a year; 3) marine grade all fuel rated fuel line which might work and is the minimum one should use as fuel line; or 4) transmission hose (I would be sure to only purchase name brand not house brand).

That's a valid question.

I always ask for USA made hose for auto transmission fluid.

Recently I have been getting Transmission Cooler Hose, USA made by Thermoid.
But, after around a year, the synthetic transmission fluid starts seeping out under the clamped hose connection. Then, I tighten the clamps and get a little longer use.
It seems as if the hot synthetic transmission fluid softens the rubber.
I have this problem on both CRDs and my 98 Grand Cherokee
Author:  WWDiesel [ Wed Oct 08, 2014 9:04 pm ]
Post subject:  Re: Transmission cooler lines
Transmission hose is a special hose that is designed to stand up to the high temperatures and components of transmission fluid which can be in excess of 200 degrees going to the cooler. Pressure is not a big issue as the hot fluid is not subjected to high pressure going to or leaving the cooler. No other type hoses will stand up to these temperatures and fluid conditions subjected to by hot transmission fluid over time. :roll:
Jegs, Summit, and others all sale high quality transmission hose designed for this application. Make sure you get the correct hose if you want it last.... :wink:
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