What type of fluid are you using?

So its come time to change the fluid in my trans, I didn't put the last fluid in but its my time now and I was wondering what type you guys were using.
Also how much fluid to put in since we're also changing the filter.

Thanks

Are you running an older technology, loose converter? Transbrake? Those need specialty fluids & coolers. You never said what you had, that is why I posted this. Otherwise, follow above.