1968 4-Pinion Locking Differential Shim Pack Chart - Traction-Lok Setup Guide

This is page 9 of a factory service/training publication introducing the "New 4-Pinion Locking Differential" (limited-slip / Traction-Lok type). The dominant element is Figure 4, a Shim Pack Usage Chart that converts a measured feeler gauge reading (0.001" through 0.050") into the number/thickness of shims to remove from the nominal shim pack and the resulting total required shim pack thickness, ranging from 0.050" down to 0.000" in 0.005" steps. A footnote states that service shims are available in 0.010" and 0.005" thicknesses. Below the chart are four labeled illustrations covering assembly procedures: Figure 5 shows installing the differential bearing with a press ram using a fiber or wood block; Figure 6 shows center block and pre-load spring installation within the differential case, identifying pinion gears, side gear, center block, pre-load springs and pre-load plate; Figure 7 shows clutch pack installation, calling out the composite plate, clutch hub, side gear, shim, friction plates, steel plate and ear guide; and Figure 8 shows the shim template tool and its clearance check area. The page was uploaded to a 1968 Mercury Cougar gallery (filename "T Lock Intro 1968 c.jpg") and appears to be part of a multi-page Traction-Lok introduction set.