How often should transmission fluid be changed?

[Numo]

N-OS X-tasy! wrote:
Check your owner's manual. I really don't know why you didn't consider that option before posting your question here.

I may be wrong, but I figure service intervals listed in owner's manuals are usually going to be pretty conservative in order to limit the manufacturer's liability and to generate sales for dealership service departments.

Thanks to all who responded!