Trans fluid level

[James Morse]

Seems like since I changed out rad, I would have lost some trans fluid setting in the rad. But it still seems high.
It says measure when hot in park. Do they mean engine hot or have to drive it a while to warm up trans fluid?
If it is still above cross hatch area is that ok or is there such a thing as too much or is that fine?

 

[RonD]

It means when trans fluid is also warmed up so drive it for 5 min then check it

No, it will not hurt anything to have it over filled but you may see some fluid dripping out the Vent tube once trans is warmed up
As trans fluid heats up(ANY fluid), it expands in volume, if there is too much fluid then it can come out the Vent at the top rear of the transmission, this Vent has a tube that runs to front and up and down the bellhousing then is open on drivers side near shift cable
Seen here: https://www.therangerstation.com/tech_library/images/4R55E.jpg
Metal tune on top side of trans


Not much fluid in a Trans cooler, there is more fluid in the lines/hose than in the actual cooler part

Picture here of trans coolers: https://ricksfreeautorepairadvice.com/wp-content/uploads/2019/05/transmission-oil-cooler-in-radiator-1024x696.jpg
Basically hollow tubes to get as much surface area as possible to transfer heat, in BOTH directions

 

[James Morse]

Thanks Ron. I was out for a drive and checked it when I just got back and it's about 1-1/2" above the top of the cross hatch.
I don't see any draining, but thanks for the heads up in case I do see it. I'm going to stop worrying about it then!
This truck drips not at all for anything which is probably the first vehicle I've had that didn't at least throw a drop of oil here/there.
I realize there are other levels I should check like differential. Manual should tell me all that.