FluidPRO DFX-1 Differential Fluid Exchange System FluidPRO is a machine for differential fluid exchanges. Has an automatic operation function so technicians can perform other tasks. Services all gear oils including synthetic. Valved hose ends prevent fluid spill. Utilizes dual diaphragm type pumps to move heavy oil for service times of five to 15 minues. Comes equipped with one gallon new and one gallon used fuel tanks.