Tranny fluid level in V8?

[Zsolt]

I am suspecting that my tranny fluid is low in the auto tranny in my 90 V8.

My mechanic says that the level has to be checked when the tranny's
temperature has reached 70C because below that it will not show the
correct level. The problem is that it is not that easy to get the tranny
to warm up to that temperature. I drove the car around for a good 40
min, but it never even got close (mind you it's getting chilly up here
in Calgary).

Anybody has any tips?

Thanks,
  Zsolt