F 150 Heritage 4WD Pickup V8-5.4L CNG VIN M (2004)
3. Rotate the differential case to see if there is any roughness which would indicate damaged bearings or gears.
4. NOTE: There is a space between the anti-lock speed sensor ring and the ring gear for measuring ring gear backface runout.
Position the special tool and inspect ring gear backface runout.
5. CAUTION: Mark the position of the bearing caps, as arrows may not be visible. The bearing caps must be installed in their identical locations
and positions.
Loosen the differential case.
1
Remove the four bearing cap bolts.
2
Remove the two bearing caps.