[Cam1959]

Where is the fluid coming out, the filler tube ?

That happened to me once when I topped it off with the wrong type of tranny fluid. Had shop remove pan, clean, replace filter,etc.

Also, it has 2 lines to circulate rad coolant to/from it. Maybe they are plugged or airlocked in a high point ?

Is coolant temp high ? Maybe change thermostat on top of engine where large hose connects.

Mine would get hot in very hot weather climbing long inclines.

Make sure the vehicle rolls easily to know a brake is not causing resistance.

Get a 2nd opinion from another shop you think you can trust, like a big name tranny specialist shop.