Originally Posted by winmutt

Correct answer: toss that automatic!

Originally Posted by MBeige

You can do both ways.

The dipstick is calibrated according to how the manual states to read the ATF level. If you know what the ATF level should be when the measurement is taken while the engine temp is at operating range and idling, shut it down and wait a few hours until it's cold. Measure the level again. Note the difference between the level of ATF on the dipstick on an engine running and warmed up, and with the engine off and cold. Then you can measure both ways.

It's the same when measuring the oil level. The manual states to measure the oil when warm, with the engine off. Note the level it stays when measured this way. Let it cool down and remeasure. Note the difference. So whenever you measure the engine cold, remember how high it was supposed to be compared to the max/min marks, and if it's within this "cold range" then you're fine.

The only difference is, you need to remember the difference between the two readings. If you forget this "cold range" reading, then you'll have to default to reading it the proper way.