Grand Marquis V8-4.6L VIN V Flex Fuel (2006)
8. CAUTION: Do not damage the differential ring gear bolt hole threads.
Insert a punch in the bolt holes, and drive off the differential ring gear.
9. If the differential ring gear backlash variation between teeth measurement, taken at the beginning of this procedure, did not exceed the
specification, proceed to Step 14. If the differential ring gear backlash variation between teeth measurement, taken at the beginning of this
procedure, exceeded the specification, the cause may be a warped differential ring gear or differential case/differential bearing damage. Proceed as
follows to verify the cause of the excessive backlash.
10. NOTE: Visually inspect the differential bearing cups and cones for discoloration indicating bearing overheating or failure.
Position the differential assembly, including the differential bearing cups and differential bearing shims as removed, in the differential housing.
Install the differential bearing caps and the bolts.
^
Tighten to 105 Nm (77 ft. lbs.).
11. Install the special tool.
1
Rotate the differential case to verify that the differential bearings have seated correctly.
2
Position the special tool.
^
Make sure there is no differential case endplay.
12. Measure and note the differential case runout.
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If the runout does not exceed the specification, Install a new differential ring gear and pinion.
^
If the runout exceeds the specification, the concern is due to differential case/differential bearing damage. Install a new differential case.
