Prior to dis assembling the assembly, measure the run out of the ring gear. Excessive run out can be caused
by a warped gear, worn differential side bearings, warped differential case, or particles trapped between the gear
and case. Run out is checked with a dial indicator mounted on the carrier assembly. The plunger on the indicator
should be set at a right angle to the gear. With the dial indicator in position and its dial set to zero, rotate the
ring gear and note the highest and lowest readings. The difference between these two readings indicates the total
run out of the ring gear. Normally, the maximum permissible run out is 0.003 to 0.004 inches (.0762 to .1016 mm).