Yes. I have this set-up.
I have a standard trans cooler up front between the air dams (no intercooler scoop in that location, I have a front mount). It's a Setrab with a fan. The fan is on a switch. I just flip it when I want (mostly when I'm stuck in NY traffic on a hot day). I like to see about 180 degrees on my trans temps as often as I can make it so.
Then the other cooler is set-up like this............
I have an aluminum sheet metal pan on my 400. I had two 1/2" bungs welded into the pan. On the inside of one of the bungs (the one designated as the outlet to the pump) I had a tube extension welded on it so I could slip on an old O-ringed type stainless element fuel filter over it on the inside. This protects large particles from going through the pump. The pump is a Tildon positive displacement unit. It's about the size and shape of an alky pump. It is mounted near the trans on the underside of the floor pan favoring the frame rail. It draws fluid through the filter, out of the pan, and pumps it through #6 braided lines to a large B&M cooler I have hung-mounted out back. This cooler also has a fan on it. Both the pump and fan for this set-up are on a single switch that comes directly from the battery power with 10 gauge wire and a 30 amp fuse. This way the system can remain running even when the master is killed and the car is powered down.
This whole set-up is kinda overkill. But I had all of the stuff lying around except the pump. Then all I needed was the pump and I got that cheap from a guy who lost interest in his project. The benefit to all this is I can cool the trans down in minutes. Whether the car is running or not on any temperature day. Also it can be used while driving to help things along after a blast on the highway. And if I want to tune on the trans brake a little, I just turn everything on and I don't have to worry much about burning up the trans. Yes, it only cools the fluid in the pan. But when you start her up it runs through and helps cool it all down anyway.
The downside is that the pump is loud. But so is everything else on my ride. I would also complain about adding more weight. Possibly 25 pounds or so. But what the hell. I'm at 3535 lbs with me in it. I can afford little bit I guess.
PS. I don't have a temp switch in the mix. I prefer to handle that myself.