Changing transmission cooler lines – advice?

[Don Holg]

I’m going to try and change the transmission cooler lines on my 2003 Pt Cruiser. This seems like an easy enough job, but I’ve never done it before. How much transmission fluid is going to come out when I pull the lines? Just wondering how much ATF+4 to have on hand. Any other advice welcome.

Thanks

Topic

[kevin gosselin]

I would get 2 but you might not need to crack the second open.

Being said, if you want to perform your transmission fluid filter and fluid change. You may want to consider buying a case of 12.

You can replace your line keeping the return line disconnected at the transmission. Drop your fluid from the pan (You may want to count how much is in the pan, so you can refill before you start it) once you start it with the assistance of maybe 2 other person, get on to start it and ready to shut it off on command and antoher person at the hose collecting the fluid in a measured container, then add fluid as it’s coming out (you will flush the converter at this moment).

So let’s say you drop 3 liter and then you flush another 4 liter, that make you to 7 but keep in mind that you might have to use more for the line being empty.

I believe those transmission pan are using silicon, so if you are not use to do those repair, then you may want to forget about everything I just suggested you.

This technique is as good or better than those service machine from repair shop as you don’t contaminate your new fluid as it doesn’t go back in the pan because you take it out with the new fluid and you also flush the cooler.

[EricTheCarGuy]

I also don’t think you’ll use more than 2 quarts but having extra on hand won’t hurt. The trickiest part of the job is fishing the lines through. That can be a challenge. Good luck and keep us posted on how the job goes for you.

[Author]

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