F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
8. Rotate the differential case to make sure it rotates freely.
Measuring for backlash
9. Using the special tool, measure ring gear backlash.
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If the backlash is within specification, refer to Backlash within specification. The specification shown is the full allowable range.
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If a zero backlash condition occurs, refer to Zero backlash.
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If the backlash is not within specification, refer to Backlash not within specification.
Zero backlash
10. If a zero backlash condition occurs, add a 0.50-mm (0.020-inch) shim to the RH side and subtract 0.50 mm (0.020 inch) from the LH side to
allow backlash indication. Check backlash. Repeat Step 9.
