Planetary Gears: Service and Repair

DISASSEMBLY
1. Inspect the low/intermediate sun gear assembly for damage.
- Gear teeth
- Thrust bearing surfaces
- Journal surface





2. Inspect the low/intermediate carrier assembly.
- Pinion gear teeth
- Spline teeth
- Pinion gear surfaces
- Bushing surfaces
- Pinion gear bearings





3. Inspect the low/intermediate carrier assembly end play.
- Use feeler gauge to measure end play.
- If end play is out of specification replace the assembly.





4. Inspect the low/intermediate ring gear.
- Gear teeth
- Spline teeth
- Thrust bearing surfaces
- Journal surface
- Lug teeth





5. Inspect the reverse/overdrive sun gear and shell assembly for damage or wear.
- Gear teeth
- Lug teeth
- Thrust bearing surfaces
- Bushing surface





6. Inspect the reverse/overdrive carrier assembly.
- Pinion gear teeth
- Clutch plate spline teeth
- Pinion gear bearings
- Thrust bearing surfaces
- Bushing surfaces
- Number 8 thrust bearing captured between the pinions and carrier





7. Inspect the reverse/overdrive carrier assembly end play.
- Use feeler gauge to measure end play.
- If end play is out of specification replace the assembly.





8. Inspect the reverse/overdrive ring gear.
- Gear teeth
- Spline teeth
- Drive sprocket teeth
- Thrust bearing surfaces
- Journal surface
- Bearings





9. Inspect the driven sprocket assembly.
- Gear teeth
- Parking gear lug teeth
- Driven sprocket teeth
- Thrust bearing surfaces
- Bearing surfaces
- Rivets
- Bushing surfaces
- Lubrication holes





10. Inspect the drive chain.
- Check the drive chain for wear stretching, or tightness of the chain links.
- The chain must move freely.





11. Inspect the gear teeth of the final drive ring gear.