TM 9-2320-266-34
20-4. Gear Tooth Contact Pattern.
i. Check the backlash at four equally spaced points
around the circumference of the ring gear. Backlash must
Determine the gear tooth contact pattern and adjust it, as
be held between 0.005 and 0.009 inch and cannot vary more
necessary, in accordance with paragraph 19.5. The only dif-
than 0.003 inch between the four positions checked. If
ference when working on the front differential assembly is
backlash does not fall within these specifications, change the
that the drive and coast sides are reversed (see figures 19-21
shim pack thickness on both differential bearing hubs to
through 19-25).
maintain the proper bearing preload and backlash.
20-8 Change 1
