What is the correct temperature for checking ATF level?

[UG_Passat]

The OP probably drives some sort of Suzuki

https://bobistheoilguy.com/forums/threads/is-suzuki-atf-3317-just-rebranded-jws3309.369787/

 

[ChrisD46]

2017 Hyundai Sonata ATF Temp Check is from 122 F. to 140 degrees F.

 

[Tomioka]

Allison 1000-2000 series transmissions idle engine in neutral, pull dipstick, hot check at 170-180°F.
Allison 3000-4000 series idle engine in neutral, press up and down arrows simultaneously on control panel, check display prompts for -/+2 quarts or OK.

 

[nicholas]

50-60 celcius for our 19 santa fe.

 

[Sam_Julier]

I check the fluid level multiple times after a cooler line exchange.

Adding small amounts until the fluid levels are in the temperature ranges on the dipstick. Verifying with my infrared temp meter.

I also measure the temperature of the new fluid and wait until it has reached ambient temperature. The fluid is stored in the stone basement of our 1934 home.

I want the new and old fluid to be as close in temperature as possible. This makes the fluid adjustment much easier.

It takes a while and is best done when the OAT is not extreme.