So today was about 89 degrees outside, and on my way home (about a 30 minute drive) my trans got up to 180. So my question is a 4 fold one.

A.) When it hits 115, is my trans temp gonne be well over 200?

B.)What is the normal operation temp for a 4.8 v8's transmission?

C.)How hard and/or expensive is it to install a trans cooler?

D.)Will my trans temps drop if i drain as much old fluid as i can and replace the filter w/ a new one?