F 150 Heritage 4WD Pickup V8-5.4L CNG VIN M (2004)
13. Rotate the differential several times to make sure the differential bearings are properly seated.
14. Using the special tool, recheck the backlash.
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If backlash is within specification, refer to Backlash within specification.
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If backlash is not within specification, refer to Backlash not within specification.
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The specification shown is the full allowable range. For the preferred range, refer to Specifications.
Backlash within specification
15. Remove the bearing caps and bolts.
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To establish differential bearing preload, increase both left and right shim sizes by the specification shown in the illustration.
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Using the special tool, ensure the differential bearing shims are fully seated and the assembly turns freely.
16. Install the bearing caps and bearing cap bolts.
