2013 Z71 Suburban additional transmission cooler

[Trey Hardy]

What's the benefit of bleeding air and pre-filling the cooler?

The fluid drains back to the pan when the engine is shut off. That is one reason why the level is checked while running and up to temp.

Cooler input/output orientation doesn't really matter. Mounted up just leaves fluid in the cooler when engine is shut off.

Air gets into lines every time engine shuts off, and gets pushed out as soon as engine starts and fluid fills the lines. Trans has a vent on top.

Probably no benefit to be honest I’ve seen people mount these sideways upside down right side up it don’t matter it’s all personal preference it’s not like having to bleed air out your radiator or anything but I did it anyways for ***** and giggles

 

[BG1988]

ok - I responded to his post as he quoted the OP, telling him to pull the trans thermostat...The OP has a '13 Z71 Burban conventional gasser w/a 6L80 so wanted to let him know (just as i recently learned on this forum) that the conventional GMT900s didn't come w/the CBVs...

That out of the way, I keep thinking about your offer to send me that 2ML70 Hybrid trans...Been wanting to do one but no yard or core supplier around here has seen one in ages, lol...Perhaps we can talk off line if you get to the point you're seriously thinking about sending one to me to overhaul.

we don't know the build date it could have a revised 6L80E transmission with the thermostat