Cleaning and Inspection

Cleaning and Inspection

Front Case Half





1. Clean the front case half in cleaning solvent, and air dry.

Notice: Refer to Machined Surface Damage Notice in Service Precautions.

2. Remove the sealer from the case sealing surfaces.
3. Inspect the case for being broken or cracked.
4. Inspect the front output shaft front bearing bore (3) for: Spun bearing Cracks
5. Inspect the input shaft bearing bore (5) for:
^ Spun bearing
^ Cracks
6. Replace the front case half if any of the above is found.
7. Inspect the sealing surfaces (1) for damage.
8. Repair small scratches or nicks with a soft stone.
9. Inspect the front case to transmission case mounting surface for damage.
10. Inspect the case threaded bolt holes (4) for damage.
11. Repair any damaged threads.
12. Inspect the transmission to transfer case studs (2) for damage.
13. Replace any damaged studs.
14. Inspect the location pins for being loose or missing.
15. Repair or replace any damaged location pins.
16. Inspect the front output shaft front bearing and the input shaft bearing for the following:
^ Roughness
^ Brinneling
^ Pitting
17. Replace the bearings if any of the above conditions are found.

Rear Case Half





1. Clean the rear case half in cleaning solvent, and air dry.

Notice: Refer to Machined Surface Damage Notice in Service Precautions.

2. Remove the sealer from the case sealing surfaces.
3. Inspect the case for being broken or cracked.
4. Replace the case if it is broken or cracked.
5. Inspect the sealing surfaces (1) for damage.
6. Repair small scratches or nicks with a soft stone.
7. Inspect the case threaded bolt holes for damage.
8. Repair any damaged threads.
9. Inspect the oil pump retainer (5) for wear or damage.
10. Replace the oil pump retainer if faulty.
11. Inspect the front output shaft rear bearing (4) for the following:
^ Roughness
^ Brinneling
^ Pitting
12. Replace the front output shaft rear bearing if any of the above conditions are found.
13. [inspect the rear output shaft bearing for the following:
^ Roughness
^ Brinneling
^ Pitting
14. Inspect for a spun bearing bore for the rear output shaft rear bearing.
15. Replace the case if a bearing has spun.
16. Inspect the retaining ring (2) for the rear output shaft rear bearing for being bent or twisted.
17. Replace a faulty retaining ring.
18. Inspect the rear output shaft bushing (3) for scoring or wear.
19. Replace a faulty rear output shaft bushing.





20. Remove the oil pump suction pipe and the oil pump suction hose from the oil pump screen,
21. Clean the pipe, hose, and screen in cleaning solvent and air dry.
22. If the screen is embedded with debris, replace the screen.
23. Inspect the hose for cracking or tears.
24. Replace the hose if it is faulty.

Rear Output Shaft





1. Clean the rear output shaft in cleaning solvent.
2. Inspect the mainshaft rear bearing (1) in the rear output shaft for the following:
^ Scoring
^ Pitting
^ Brinneling
^ Excessive wear
3. Inspect the rear output shaft splines (3) for damage or excessive wear. Witness marks at the location of the gears is normal.
4. Inspect the rear output shaft planetary gear (2) for the following:
^ Chipped teeth
^ Broken teeth
^ Excessively worn teeth
5. Replace the rear output shaft if any of the above conditions are found.

Mainshaft





1. Clean the mainshaft in cleaning solvent.
2. Clean the mainshaft oil galleries and air dry.

Important: Do not attempt to smooth any roughness in the bearing journals.

3. Inspect the mainshaft front bearing journal (1) for the following:
^ Scoring
^ Pitting
^ Excessive wear
4. Inspect the mainshaft splines (2) for excessive wear. Witness marks on the splines are normal.
5. Inspect the planetary sun gear bearing journal (3) for the following:
^ Scoring
^ Pitting
^ Brinneling
^ Excessive wear
6. Inspect the mainshaft rear pilot bearing journal (4) for the following:
^ Scoring
^ Pitting
^ Brinneling
^ Excessive wear
7. Replace the mainshaft if any of the above conditions are found.
8. Inspect the planetary sun gear bearing (5) for the following:
^ Scoring
^ Pitting
^ Brinneling
^ Excessive wear
9. Replace the planetary sun gear if it is faulty.

Differential Planetary Carrier





1. Clean the differential planetary carrier in cleaning solvent. Do not disassemble the planetary carrier.
2. Air dry, and ensure all cleaning solvent is removed from the bearings in the planetary gears (3). Do not spin the planetary gears with compressed air.
3. Inspect the planetary gears for chipped teeth.
4. Inspect the planetary gears for debris embedded in the root of the teeth.
5. Inspect for a washer (4) being on each side of the planetary gears.
6. Inspect the low range teeth (1) for damage or excessive wear.
7. Inspect the thrust washer surface (2) for scoring or excessive wear.
8. Replace the differential planetary carrier if any of the above conditions are found.
9. Inspect the differential planetary thrust washers for excessive wear or scoring.
10. Replace the thrust washers if they are faulty.

Drive Chain and Sprockets





1. Clean the drive chain (1), drive sprocket (3), and driven sprocket (2) in cleaning solvent and air dry.
2. Inspect the drive chain (1) for the following:
^ Loose link pins
^ Binding or stiff links
^ Debris embedded in the links
^ Worn teeth surfaces
3. Replace the chain if any of the above conditions are found.
4. Inspect the driven sprocket (2) and the drive sprocket (3) for the following: Chipped teeth Excessive worn gear surfaces, slight wear marks are normal Debris embedded in the root of the teeth
5. Replace the sprocket if any of the above conditions are found. The chain and sprockets may be replaced separately.

Front Output Shaft





1. Clean the front output shaft in cleaning solvent and air dry.
2. Inspect the front output shaft rear bearing race (1) for the following:
^ Scoring
^ Pitting
^ Brinneling
^ Excessive wear
3. Replace the faulty front output shaft rear bearing race.
4. Inspect the front output shaft splines (2) for damage.
5. Replace the front output shaft if it is damaged.

Input Gear





1. Clean the input gear in cleaning solvent and air dry.
2. Inspect the input bearing (1) for the following:
^ Pitted
^ Wear
^ Corrosion
3. Replace the input bearing if any of the above conditions are found.
4. Inspect the input gear seal surface (2) for pitting or excessive wear.
5. Inspect the input gear thrust surface (3) for wear or damage.
6. Inspect the cup plug inside of the input gear for leaking.
7. Replace the input gear if any of the above conditions are found.

Viscous Coupling





1. Inspect the viscous coupling for a bulged rear cover (1). The rear cover should be flat (2).
2. Replace the viscous coupling if the rear cover is bulged.

Sun Gear and Annulus Gear





1. Clean the sun gear (2) and the annulus gear (1) in cleaning solvent and air dry.
2. Inspect the annulus gear (1) for the following:
^ Damage or wear
^ Chipped gear teeth
^ Debris embedded in the root of the teeth
3. Replace the annulus gear if any of the above conditions are found.
4. Inspect the sun gear teeth for the following:
^ Damage or wear
^ Chipped gear teeth
^ Debris embedded in the root of the teeth
5. Inspect the planetary sun gear bearing journal in the sun gear for the following: Roughness Brinneling Pitting
6. Inspect the sun gear thrust surfaces for scoring or roughness.
7. Replace the sun gear if any of the above conditions are found.
8. Inspect the planetary carrier sun gear thrust washer for scoring or wear.
9. Replace the thrust washer if it is faulty.