To drop the pan or not?!

I'm adding a transmission cooler to my new to me Tundra. Pretty much like the GCS but I pieced it together myself and saved $600.

Anyway, I got 12qts of fluid so I figured while I'm at it, I can drain and fill this amount by pinning the thermostat.

My goal is to drain and fill about 9 quarts. The cooler and new lines will take about 1.5 quarts. Then I'm keeping 1.5qts available for final level adjustments.

My question is, should I drop the pan to clean out the sediments? The truck was put into service June 2020 and now has 74k miles. I read some posts saying a large fluid change will cause sediments to start moving around the transmission since the new fluid has better detergents and can lift the sediments and cause issues. Do I even have to worry about that at 74k miles?

The truck has been in AZ and now CA so there shouldn't be issues with the bolts right?

 

You should be fine without removing the pan which could turn into a nightmare if the bolts snap. The reason they seize is because of dissimilar metal corrosion not salt/rust. Good luck with the install.

 

Personally I would not, that is a can of worms id rather not open and not sure the benefit is worth the effort.