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Discussion Starter #1 (Edited)
Hi all, So obviously I have the dreaded trans cooler lines issue only thing it's my driver side leaking right where the rubber hose meets the metal part. After reading some threads I was going to order the teams lines but hear it's a bad idea to replace the lines because of issues of fitting them back in?
I would love to do the external cooler but out of all the threads I've read no one has been able to confirm if there have been any issues during winter in the north. I'm in Toronto Canada now so it would be nice to have someone who deals with similar cold/snow feedback.

Any help is appreciated as I would like to get this taken care of by Friday.
 

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2005 CTS 3.6L
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I've been running an external cooler in -40C. Haven't had any issues. Not sure what kind of issues you would expect to have?
 

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Discussion Starter #3
talladega said:
I've been running an external cooler in -40C. Haven't had any issues. Not sure what kind of issues you would expect to have?
Thanks for the reply. Not really sure but after reading threads that always seemed to be everyone's concern of how it held up during the winter months and the fluid being too cold. -40 and your still going? That's a pass for me.
What specs exactly should I make sure the cooler has? Do you know where I could pick up a cooler and hose? Instead of online? I'll get someone to install it.
 

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cts4 2008 DI, cts 2005 3.6(totaled)
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I live in quebec mtl and I was thinking for external trans cooler for awhile , but here in winter , we can get around -30 . I had the trans issue 1 time in the highway(big white smoke) . Towed to a independante garage , they only change the hose and drain trans oil . After a year, I didn't have the problem.

my english isn't super great sorry. I speak mostly french :)
 

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Thanks for the reply. Not really sure but after reading threads that always seemed to be everyone's concern of how it held up during the winter months and the fluid being too cold. -40 and your still going? That's a pass for me.
What specs exactly should I make sure the cooler has? Do you know where I could pick up a cooler and hose? Instead of online? I'll get someone to install it.
I'm not too sure on exact specs. I dont remember which one I got. I just got it locally and had the shop do it when they replaced my rad and made sure my tranny wasnt busted.

I think B&M has been mentioned before. I would imagine any local auto parts places would have them or could order them in.

If you check other threads of people doing it there may be some specific part#'s or specs mentioned.
EDIT: look at this thread: http://www.cadillacforums.com/forums/cadillac-cts-first-generation-forum-2003/415585-transmission-cooler-install-fully-documented.html
 

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Discussion Starter #6
Thanks for the help, after thinking for a while I decided to go for the external cooler too and I'm happy I did with no negative effect so far and it's been -17 so I'm happy about that.
 

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Most synthetic automatic transmission fluids maintain proper lubrication specs until around 130 below zero. So you'll be dandy in that department. Pretty much the only thing you have to watch out for is size. If the after market cooler is smaller than the oem unit it may run hotter especially if it doesn't have a fan attached to it.
 
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