Number 7 Check Ball Location - Main Control Valve Body Diagram (TB-8531-B)

This document is a single line-art schematic labeled "Fig 1: Number 7 Check Ball In Main Control Valve Body." It shows an isometric illustration of an automatic transmission main control valve body casting, viewed from the fluid-passage (separator plate) side, with its hydraulic channels and bores drawn in detail. A single callout numbered "7" points to the position of the number 7 check ball within the valve body passages. Several other small dark circles in the drawing indicate additional check ball seats, but only the number 7 ball is identified with a callout. The illustration carries the figure/reference identifier "TB-8531-B" in the lower right corner, suggesting it was reproduced from a technical bulletin. The scan was uploaded to the gallery of a 2000 Mercury Grand Marquis alongside related transmission diagnostic documents (TCC lockup, overdrive, stall speed test, pressure tap references), indicating it is intended as a reference for locating the number 7 check ball during valve body service or diagnosis of shift/torque converter clutch concerns. The document itself contains no year, model, engine, part numbers, torque specs, or additional text beyond the caption, callout, and figure code.