You check the Transmission Fluid when its hot
Normally your dipstick has a hot and cold mark on it. If not check it hot, always check it with the engine running on an even surface.
It will tell you on the stick, either "check hot" or "check cold", running or not.
Check engine oil when you have just finished driving. Check Transmission fluid when the car is running and the transmission in in N (manual) or P (automatic).
it should have a cool check level and a hot check level on the transmition dip stick. Yes, it has marks for both cold and hot.
If your car running less then 10 minutes then it's considered a car with cold transmission fluid (fluid should be in the region of cold level marks, but not lower), if more then 10 minutes then it's hot (fluid should be in the region of hot level marks, but not higher). When you check transmission fluid level your car should be running.
You need to check the transmission computer for codes to know possible causes.
Transmission fluid will show full when it is cold, but low when it is hot if it is low on fluid. Transmission fluid has to be checked when the car is warm.
Check the viscosity of your transmission fluid, then ask what's appropriate weight for transmission fluid in your area.
No real difference
That depends on the make and model, some are meant to be checked cold, other warm or hot.That depends on the make and model, some are meant to be checked cold, other warm or hot.
On the dipstick there is a safe range. You can check it either hot or cold. When cold the level should be close to the bottom of the safe range. When hot it should be close to the top of the safe range.
cold. If you open the radiator when the car is hot, it can spray all over the place.