Transmission leaking after replacing the shift solenoids?

I think you have other issues because the breather cap is not a sealed unit, it does what it says, breaths. So, when you add fluid goes slow and does not overfill, also do not have the transmission in gear when filling, this will whip the fluid into a foam and leak out of the vent. Also, you may have an internal problem that is causing the fluid to foam due to a leak in the valve body/shift solenoids. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem.

Thank you for the information. I did not pour the fluid in slowly, but I have a feeling that is not the issue. What I have done so I can drive the vehicle is install clear tubing to the breather vent tube and run it back to the firewall. After a couple of design changes, I'm able to drive the vehicle and not lose fluid. Any fluid that does come up the tube drains back into the transmission after turning off the engine. The transmission is shifting fine. I did test all 9 of the solenoids I replaced with an ohm meter and found 7 of the solenoids in the range of 15.5-16.3 ohms and two were at 2.5 ohms. The shifting problems went away. I have driven the vehicle for about 100 miles and I'm still getting fluid in the vent tubing I in. I'll send a video as soon as I can. Any ideas what is going on with this?

Thank you for your time.

This can be caused by air being sucked into the front pressure pump because of a fluid filter gasket or seal that is leaking, or the filter has fallen off.