Naah .. use 90psi at least. More air, the better it cleans. Trans fluid sees 100 psi at low throttle positions, 200psi at WOT on a stock trans.

That's why you use trans cooler line, and not high pressure fuel line or something else cheap.

 

I ended up renting a small air compressor and blowing air through the lines at 200psi. Worked very well!!

I also bought a new tranny cooler, roughly twice the size of the stock unit.

Chris