Checking ATF level is done with the car in Park and the engine running at idle. Waiting isn't necessary.
One waits to check the engine oil after shutting down the engine so as to allow the oil to flow from the top of the engine down to the oil pan by our good freind gravity.
[Edited by Hazen on 03-09-2001 at 12:44 AM]
Happiness is a well stocked