Ford Transmission Ring Gear Speed Sensor Trigger: Previous vs New Design (ATS)

This document is a side-by-side technical illustration comparing two versions of an automatic transmission ring gear, labeled "Previous Design" and "New Design." The left drawing shows the earlier ring gear, which uses small round holes machined into its outer circumference to trigger the transmission speed sensor; two arrows call out these "Holes To Trigger Speed Sensor." The right drawing shows the revised ring gear, which instead uses raised, extended lugs on the outer surface to trigger the speed sensor, labeled "Extended Lugs To Trigger Speed Sensor." Both gears are drawn in isometric view showing their internal gear teeth and external splined bands. A copyright notice at the bottom right reads "Copyright © 2006 ATS" (partially cut off at the page edge). The page appears to be one figure from a larger transmission reference or rebuild guide (the reverse side shows through faintly). A reader can learn from this page how to visually distinguish the earlier hole-triggered ring gear from the later lug-triggered design when servicing or identifying transmission components, which is important because the speed sensor trigger method differs between the two designs. No specific vehicle year, model, or part numbers are printed on the visible portion of the page.