Hi.
Many vehicles show in the dipstick, markings that differ for checking the fluid level when cold or when hot. And can be perhaps around an inch+ from one to the other.
How that translates to our ZF 4HP22 transmissions ?

The level is supposed to be read only when cold; does it mean that when hot, fluid will rush out if the filler plug is removed at idle/neutral ?

 

Possibly but then the fluid is also distributed throughout the transmission. Either way, you'll get a false reading