Transmission Cooler...........which line is the return line?

[atxjax]

Wanting to flush a trans on a 03. Do you guys know which line is the return?

 

[BrooklynBay]

The upper line is the return line.

 

[atxjax]

Awesome thanks. Going to do a fluid exchange. Disconnect that line, start up truck. letit pump 2 quarts out then feed the pan two quarts. Keep doing that until its all new fluid.

 

[BrooklynBay]

You might want to add an external filter while the line is disconnected.

 

[turborich]

I would just do a pan drop and fluid/filter change. If you have high miles or the fluid is burnt then you are opening a can of worms. Make sure to use Mercon V. Doing what you suggested doesn't get rid of any of the crap in the pan or filter.

 

[atxjax]

I would just do a pan drop and fluid/filter change. If you have high miles or the fluid is burnt then you are opening a can of worms. Make sure to use Mercon V. Doing what you suggested doesn't get rid of any of the crap in the pan or filter.

Yes. I plan on dropping pan, swapping out my solenoid pack, filter and do a complete fluid flush.