Auto transmission cooler lines need replacing

[Champ]

My transmission cooler lines are leaking at the juction between the hard lines and the rubber lines. Turns out its not the o-rings - the metal lines are corroded and have to be replaced. I have the new metal lines and transmission fittings plus a bypass thermostat and am going to bypass the radiator heat exchanger circuit with a separate cooler. Does anybody know if the metal send and return cooling lines from the transmission are above or below the normal trans fluid level? '99 Limited. Thanks

 

[Champ]

In other words, do I need to drain any of the tranny fluid before removing the cooler lines from the side of the tranny housing? thanks!

 

[tre9er]

In other words, do I need to drain any of the tranny fluid before removing the cooler lines from the side of the tranny housing? thanks!

I would just drain it. You'll only be out a few quarts. Nothing wrong with refiling with fresh anyway.

 

[TheeMikeB]

If you have corroded lines you probably have contaminated fluid too. I'd do a self flush when I was finished.

Dropping Pan And Flushing Transmission

If you don't want to drop the pan just follow steps: 1, 2, 3 (only remove (2) front skid plates), 6 (ignore option), and 36 thru 44.

I did this last month by myself in about an hour and used 4 gal of Tranny fluid.

 

[Champ]

Thanks guys it looks like a transmission drain is in order..