TM 10-3930-641-34-1
TRANSMISSION TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
11. TRANSMISSION DOES NOT WORK WHEN SPEED SELECTION LEVER IS PLACED IN ANY SPEED
Step 1. Failure of transmission to operate at all indicates the total breakdown of some component, or components.
Investigate the following potential causes of low oil pressure. Bear in mind that it may be a combination of these factors.
a.
Check oil level in transfer gear case.
Add oil. (See LO 10-3930-641-12.)
b.
Inspect oil pump and oil pump drive for damage.
Repair oil pump or oil pump drive. (See page 4-188.)
c.
Inspect for air leaks on suction side of pump.
Repair as necessary. (See TM 10-3930-641-20.)
d.
Test adjustment of relief valve. (See page 4-231.)
Repair or readjust as necessary. (See pages 4-231, 4-228.)
e.
Test transmission pressure control valve. (See page 4-202.)
Adjust or repair as necessary. (See page 4-205.)
Step 2. Inspect torque converter for damaged parts.
Repair as necessary. (See page 4-17.)
Step 3. Inspect input transfer gears for damaged parts.
Repair as necessary. (See page 4-124.)
Step 4. Inspect transmission for damaged parts.
Repair as necessary. (See page 4-68.)
Step 5. Inspect output transfer gears for damaged parts.
Repair as necessary. (See page 4-138.)
Step 6. Inspect differentials for damaged parts.
Repair as necessary. (See page 4-271.)
12. VEHICLE MOVES WHEN SELECTION LEVER IS IN NEUTRAL
Step 1. Inspect direction control linkage for correct adjustment of damaged parts.
a.
Replace damaged parts. (See TM 10-3930-641-20.)
b.
Adjust linkage. (See TM 10-3930-641-20.)
Step 2. Test sequence and pressure valve. (See page 4-237.)
Adjust/repair. (See page 4-205.)
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