Measuring Backlash

1. Install a dial indicator so the button contacts the outer edge of the pinion flange. The plunger must be at a right angle to the pinion flange.
2. Move the pinion flange through its free play while holding the differential carrier. Record the dial indicator reading.
3. Divide the dial indicator reading by 2 to obtain the actual backlash when using this method. Example: A dial indicator reading of 0.16 mm means that there is actually 0.08 mm backlash.
4. Follow the steps for adjusting backlash.
- Gear backlash should be between 0.08 to 0.25 mm (0.003 to 0.010 inch) with a preferred specification of 0.13 to 0.18 mm (0.005 to 0.007 inch).
- If the backlash is incorrect, adjust the sleeves as necessary. Always maintain the "one notch" preload on the side bearings. Example: If it is necessary to turn the RIGHT sleeve IN one notch, the LEFT sleeve must be turned OUT one notch.
- To increase backlash, turn the left sleeve in, and turn the right sleeve out an identical amount. To decrease backlash, turn the right sleeve in and turn the left sleeve out an identical amount.
- Changing the sleeves one notch will change backlash about 0.08 mm (0.003 inch).