Express 3500 V8-6.0L (2010)
7. On axles with a locking differential, remove the shaft part way. Rotate the case until the pinion shaft touches the housing.
8. On axles with a locking differential, use a screwdriver, or a similar tool, to enter the differential case and rotate the C-lock (1) until the C-lock
aligns with the thrust block (2).
9. Push the flange of the axle shaft (3) toward the differential.
10. Remove the C-lock from the button end of the axle shaft.
