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TM 10-3930-636-24&P
Section VI. POWER TRAIN MAINTENANCE
This section contains the information you’ll need to maintain the:
. Transmission
. Drive shaft assemblies and universal joints
l Front and rear axles
It gives you instructions on how to troubleshoot problems, and repair
or replace the components that are within the scope of organizational
maintenance.
Para
Para
Troubleshooting Symptom Index . . . . . . . . . . . . . . 2-35
Transmission Hoses. Lines and Fittings . . . . . . . . 2-38f
Transmission Troubleshooting . . . . . . . . . . . . . . . . . 2-36
Transmission Oil Cooler . . . . . . . . . . . . . . . . . . . 2-38g
Axles and Drive Shaft Assemblies Troubleshooting . 2-37
Axles and Drive Shaft Assemblies Maintenance . . . . 2-39
Transmission Maintenance . . . . . . . . . . . . . . . . . . 2-38
Front Drive Shaft Assembly and Support Bearing . 2-39a
Transmission Servicing and Inspection . . . . . . . . 2-38a
Center Drive Shaft Assembly . . . . . . . . . . . . . . . 2-39b
Transmission Linkage Controls . . . . . . . . . . . . . 2-38b
Rear Drive Shaft Assembly . . . . . . . . . . . . . . . . . 2-39c
Axle Disconnect Lever . . . . . . . . . . . . . . . . . . . . 2-38c
Front and Rear Axle Assemblies . . . . . . . . . . . . . 2-39d
Dipstick Tube Assembly . . . . . . . . . . . . . . . . . . . 2-38d
Axle Breathers . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39e
Control Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38e
Front and Rear Axle Shafts and Bearings . . . . . . 2-39f
2-35. TROUBLESHOOTING SYMPTOM INDEX
Para/Malfunction Page
TRANSMISSION
Foamy Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-36/1
2-194
Slow or erratic transmission shifting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-36/2
2-195
High transmission oil temperature.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-36/3
2-196
Loss of drive in all ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-36/4
2-197
Loss of power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-36/5
2-198
AXLES AND DRIVE SHAFT ASSEMBLES
Lubricant leaking from differential breather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-37/1
2-199
Continuous axle or wheel noise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-37/2
2-199
Differential carrier assembly overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-37/3
2-200
Lubricant leaking from differential carrier assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-37/4
2-200
Excessive noise or vibration in drive shaft assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-37/5
2-200
2-36. TRANSMISSION TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. FOAMY OIL
Step 1.
Check oil level with transmission at operating temperature and engine operating.
a. If oil level is not between FULL and ADD marks, add oil (refer to current lubrication order).
b. If oil level is between FULL and ADD marks, proceed to step 2.
Step 2. Check source of oil and ensure that oil is correct grade and type.
a. If oil is not correct grade and type, drain oil, replace oil filter, and add new oil (para 2-38a)
(refer to current lubrication order).
b. If oil is correct grade and type, proceed to step 3.
2-194
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