Backlash Inspection

Backlash Inspection
1. Remove the output shafts and differential case assembly.
2. Thoroughly clean the ring gear and drive pinion teeth, and paint the ring gear teeth with Prussian Blue lightly and evenly.





3. Rotate the pinion three full turn in the forward and reverse directions to produce a contact pattern on the ring gear.





Good contact pattern





4. Measure the backlash of the ring gear.
^ Set the dial gauge tip at a right angle to the ring gear teeth.
^ Measure four points on the ring gear 90° apart.
^ Backlash will be within the standard if at one point the ring gear backlash is within the standard, minimum measurement of 0.05 mm or above and the difference between the maximum and minimum measurements do not exceed 0.07 mm.
^ Both adjustment screws must be adjusted. For example; if you turn one adjustment screw one notch clockwise, you must turn the other adjustment screw one notch counterclockwise.
Backlash:
Standard: 0.09 - 0.11 mm (0.0035 - 0.0043 inch)
Minimum: 0.05 mm (0.0020 inch)
Difference range: 0.07 mm (0.0028 inch)