Quote:

I have a very nice trans cooler with a fan and filter setup just curious what is safe to use to clean it out.

If it ain't in the car right now & I gathered from the quote that it ain't then what Shorty said, pour some solvent in it & blow it out with your rubber tipped shop air nozzle (go both ways) & if your solvent tank has a pump then pump some solvent thru both ways. If it's in the vehicle then get the pressureized can of flush that comes with a hose at your parts house to attach it to one of the cooler fittings.

live every 24 hour block of time like it's your last day on earth