I want to do a tranny flush and fill to my sons 4runner(automatic) I know there is a procedure that involves removing the cooling lines, but I have not been able to find the link for this. I have used this procedure on my powerstroke, but I do not know which line is the return line to the tranny. I believe it is the line that connects to the rear of the tranny, but i would like confirmation. Thanks in advance.

 

Is this what you're looking for? http://www.amsoil.com/faqs/atf_and_f...procedures.pdf

 

That helps some, but I would really like to know which line is the return line to the tranny. I know there is someone out there who knows these things inside and out. Maybe I am in the wrong section. Thanks tomstin for the link. I use a modified version for my Superduty.

 

I believe it's the rear line.

 

The rear line is the return line.

https://www.yotatech.com/forums/f128...4runner-76336/

http://www.gadgetonline.com/TransFlush.htm

 

This guy did it earlier in the year in this thread

https://www.yotatech.com/forums/f2/a...l#post50781771

 

I believe the front line on the AT is out (hot) and the rear is the return (cool), but easy enough to check, pull one off, put it in a bucket, add a little pigtail of hose to the barb, place it in another bucket, start the truck for 10 seconds or so, that will tell you what way the fluid is pumping. That's how I confirmed the fluid direction when I installed my AT cooler.