Hot Oil is an excellent carrier of dirt. The viscosity actually attacks foreign material and carries it with it. The molecules surround the dirt and prevent it from adhering to its environment. The detergents in ATF also help to remove paint while moving.
Solvents using other machines do little to remove contaminants under these conditions. It actually dries up the environment in which the debris is located, thereby clinging to its surroundings.
The only way to remove the material trapped in the radiator tissue is to completely turn the flow for a microsecond! The split second is just long enough to remove the debris.
Pulsating pumps, which fluctuate between 0-40 PSI due to the slowness of the action, have little effect when they reach the radiator and do nothing to remove dirt!
The problems technicians face are that they can not disassemble a cooler and clean it. They can not see the debris, and they can not reach it with a tool. A dirty radiator will cause the transmission to fail! There may be enough debris in it to easily cause multiple comebacks. Using traditional methods of flushing anything they can do is, at best, a well-founded guess as to whether the cooler is clean or not.
The computer-controlled high-speed flush is the only way to remove the dirt that gets stuck in the thousands of "traps" in the cooler. Combine this with the patented process of being able to see the dirt when it gets into the 28 micron, testable capture screen, and you eliminate guesswork.
Once the dirt has found its way through the cooler, it can only check this fact by seeing it on a controllable screen.