Transmission cooler lines leaking

[Rawze]

Chamber is right. Those heat exchangers for trannies tend to rot out after 500+k miles (or 6+ years) and it ruins the tranny in a hurry when they do start seeping. I have seen this time and again. This is why a lot of people have switched over to using air-cooled heat exchangers instead.

It is far less of a hassle to deal with a leaking tranny line that is going to an air cooled heat exchanger as they age, than it is to find out the hard way one day that coolant has been seeping into your tranny and now the tranny needs a $4,000 rebuild.

ref: http://rawze.com/forums/showthread.php?t...3#pid28933

Some people may have a specific need to use a coolant-based heat exchanger on their tyranny .. but otherwise, I would say it is not really a good idea vs an air cooled one. Using a good quality brand of synthetic oil in the tranny otherwise is just fine for dealing with those winter months and cold applications for most people. My air cooled tranny lived a very long lifespan and I drive in the coldest of environments in winter months just like anyone else would that hauls freight across all of the 48-states.

Hear is a link to my own tranny tear-down after 1.4 million miles and it had not being touched internally. It is in a prostar and it has always been air-cooled : http://rawze.com/forums/showthread.php?t...6#pid52116