Section III. POWER TRAIN MAINTENANCE

TM 10-3930-636-24&P

Section III. POWER TRAIN MAINTENANCE

This section contains the information you'll need to maintain the:

Transmission

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

direct support maintenance.

Para

Charging Pump Assembly . . . . . . . . . . . . . . . 3-19e

Troubleshooting Symptom Index . . . . . . . . . . . 3-16

Transmission Oil Cooler . . . . . . . . . . . . . . . . 3-19f

Transmission Troubleshooting . . . . . . . . . . . . . 3-17

Axles and Differential Carrier Assemblies

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 3-18

Front Axle Assembly . . . . . . . . . . . . . . . . . . 3-20a

Transmission Maintenance . . . . . . . . . . . . . . . . . 3-19

Rear Axle Assembly . . . . . . . . . . . . . . . . . . . 3-20b

Transmission Pressure Checks. . . . . . . . . . . 3-19a

Front Axle Differential Carrier

Transmission Mounts . . . . . . . . . . . . . . . . . . 3-19b

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 3-20c

Transmission Removal . . . . . . . . . . . . . . . . . 3-19c

Rear Axle Differential Carrier

Control Valve and Modulation Valve

Assemblies . . . . . . . . . . . . . . . . . . . . . . . . 3-19d

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 3-20d

3-16.

TROUBLESHOOTING

SYMPTOM

INDEX

Para/Malfunction Page

TRANSMISSION TROUBLESHOOTING

3-123

3-17/1

High transmission oil temperature.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-123

3-17/2

Loss of drive in all ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-124

3-17/3

Loss of power and/or loss of drive in any one range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AXLES AND DIFFERENTIAL CARRIER ASSEMBLIES TROUBLESHOOTING

3-125

3-18/1

Continuous axle or wheel noise... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-125

3-18/2

Lubricant leaking from differential carrier assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-17. TRANSMISSION TROUBLESHOOTING

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. HIGH TRANSMISSION OIL TEMPERATURE

Check transmission lube pressure at lube pressure port (para 3-19a, steps 6 through 8).

a. If lube pressure is low, replace charging pump assembly (para 3-19e).

b. If lube pressure is normal, replace transmission (para 3-19c) (torque converter oil sealing

rings worn and require replacement) and notify general support maintenance.

2. LOSS OF DRIVE IN ALL RANGES

Step 1. Perform step 5 of paragraph 2-36, MALFUNCTION 4.

Replace control valve assembly (para 3-19d); if replacement of control valve does not help,

proceed to step 2 below.

3-123