Abstract: A fluid filter for use with a fluid having particulate material includes a housing having an internal surface having a set of depressions formed therein to trap particulate material in the fluid, and a filter media disposed in the housing to filter the fluid. In some embodiments, the fluid filter may be a transmission filter or an engine filter. In addition, a transmission system includes a transmission pan having an internal surface with a set of depressions formed therein, and a suction side transmission filter disposed in a transmission pan wherein the suction side transmission filter also has a filter housing having an internal surface with a set of depressions formed therein. Further, a magnet may be coupled to the depressions to aid in the capture and retention of ferromagnetic particles.

Abstract: A method and apparatus of capturing and retaining debris in a fluid housing, including a transmission or engine includes a series of depressions forming a grid in the transmission pan, engine pan or any other fluid housing.