Ford Bronco E4OD Transmission Cooler & Remote Filter Plumbing Diagram

This document is a schematic diagram (labeled "C") illustrating two plumbing configurations for an automatic transmission fluid cooling circuit with an in-line remote spin-on transmission fluid filter (the filter canister is labeled "Perma-Cool OIL FILTER"). The left diagram shows the transmission's fluid line routed first through the remote filter, then into the radiator's in-tank cooler, then through an external auxiliary transmission cooler (stacked-plate/fin style), and finally returning to the transmission. The right diagram shows a simpler setup in which fluid passes from the transmission through the remote filter into the radiator's in-tank cooler and directly back to the transmission, without an auxiliary cooler. Directional arrows on both diagrams indicate the flow path of transmission fluid through the hoses and coolers. A reader can learn where to plumb a remote spin-on transmission filter relative to the factory radiator cooler, and how an optional auxiliary cooler is placed downstream of the radiator cooler in the return line. The document contains no written instructions, part numbers, torque specifications, model years, or vehicle identification, it is purely pictorial. It was uploaded to a 1990 Ford Bronco gallery alongside E4OD transmission-related documents, suggesting intended use for an E4OD transmission cooler/filter installation, though the diagram itself is generic.