Checking the transmission

1. Measure:

• Main axle runout (with a centering device and dial gauge "1") Out of specification Replace
  the main axle.

2. Measure:

• Drive axle runout (with a centering device and dial gauge "1") Out of specification Replace
  the drive axle.

3. Check:

• Transmission gears Blue discoloration/pitting/wear
  Replace the defective gear(s).
• Transmission gear dogs Cracks/damage/rounded edges
  Replace the defective gear(s).

4. Check:

• Transmission gear engagement (each pinion gear to its respective wheel gear) Incorrect Reassemble the
  transmission axle assemblies.

5. Check:

• Transmission gear movement Rough movement Replace the
  defective part(s).