Ford AOD Transmission Oil Circuit Diagram - 4th Gear Part Throttle OD Range

This document is a hydraulic oil circuit diagram (Fig. 8) for the Ford AOD automatic transmission, showing fluid routing while operating in 4th gear at part throttle in the "OD" range, as documented for a 1987 Ford LTD Crown Victoria. The schematic depicts the complete valve body and clutch/servo hydraulic layout, with callouts indicating which friction elements are engaged in this state: the OD servo and direct clutch are APPLIED, while the intermediate clutch is APPLIED BUT INACTIVE. The diagram traces oil passages among components including the pump, screen, sump, main oil pressure regulator valve, oil pressure booster valve, converter and converter relief valve, cooler and lube circuits, 1-2/2-3/3-4 shift valves, shuttle, backout, capacity modulator and accumulator valves, T.V. limit and modulator valves, throttle valve/plunger/plug, manual valve (P R N D 3 1), and governor assembly. A pressures legend distinguishes Line, Governor, Throttle (T.V.), Pump Inlet, and Converter pressures, plus Exhaust and Cooler And Lube flow arrows. Reference number G97A03230 appears on the drawing; the page is credited Copyright 2003 MRIC, LLC and printed February 03, 2004. Readers can use it to diagnose AOD overdrive-related shift and pressure problems by seeing exactly which valves and circuits are active in 4th gear part throttle.