I agree with this. Here in Indiana when I check fluid on almost every vehicle at 50K it is brown and should have been changed a while ago. 30K is a good interval for almost anywhere. It won't hurt to do it early anyways."But: transmission fluid flushes? Uh uh. Flushes have been known to break crap loose that eventually clog a fluid filter, and fry the tranny."
I disagree with your comment. A tranny should not have any crap in it. If there is, it is already to late for the tranny. Most people follow mfg. suggested intervals for tranny maintenance which is mostly too late IMO. You need to check your oil often to see any discoloration and smell. If it si dark and smell gas, it is time to change it regardless of your mileage. I find Chevy's 50K interval too late. I believe this should be 30K.
I also have 05 Ford Escape, which is the easiest vehicle to work on it and I do my own flushes. I ve 85K on it and I've done 3 flushes so far.
The 6 speed for the 6 cyl and same for the 4 cylinder does not have a trans pan to drop for changing fluid. There is a drain plug on the bottom and a fill hole on the top, in your case with a dipstick. According to GM a drain and fill will require 5 quarts of fluid to fill it up afterwords. Total fill is 9.6 quarts, so it changes a decent amount of it.
This is where a flush has it benefits. Where I work we flush 14 quarts of trans fluid after running the flush chemical through the trans. The main benefit I like of the flush is it gets to the fluid that will contaminate the new fluid in just a drain and fill. Also, it gets to the fluid in the torque converter. I have flushed trans fluid when it was very dark with no negative effects later down the road.