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59. LONG 2-3 SHIFT WITH END BUMP, 2-3 SLIPPAGE, OR EARLY 2-3 SHIFT | Up
/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual | Next
62. NO REVERSE OR SLIPS IN REVERSE |
TM 9-2320-289-34
Table 2-1. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR inspection
Corrective ACTION
60. FIRST AND SECOND SPEEDS ONLY; NO 2-3 SHIFT
Step 1.
Step 2.
Step 3.
Step 4.
Step 5.
Step 6.
Check tailpipe, muffler, exhaust manifolds, and exhaust pipe for restrictions.
Clear any restrictions.
Check for damaged or loose vacuum hoses. Remove, clean, and inspect vacuum
modulator assembly and modulator valve. (See paragraph 5-3)
Remove, disassemble, clean, and inspect governor assembly.
5-5)
Remove, disassemble, clean, and inspect transmission control
(See paragraph 5-7)
Remove, disassemble, clean, and inspect direct clutch assembly,
(See paragraph
valve assembly,
(See paragraph
5-17)
Remove, disassemble, clean, and inspect front servo assembly (see paragraph
5-1 O) and rear servo assembly (see paragraph 5-9).
61. NO DRIVE OR SLIPS IN DRIVE
Step 1.
Inspect transmission linkage for damage.
Replace any damaged components. (See paragraph 5-2)
Step 2.
Test transmission oil pressure with brakes applied, “D” (Drive)) engine at
1000 rpm, (See paragraph 5-11)
If oil pressure is low, perform step 3.
If oil pressure is normal, perform step 5.
NOTE
There is no approved way to check transmission oil filter for blockage or
restrictions.
Step 3.
Remove transmission oil filter and check for water in hydraulic fluid. (See
TM 9-2320-289-20) Inspect intake pipe and “O“ ring for improper positioning and
damage.
Replace hydraulic fluid and transmission oil filter if any water Is present.
Replace intake pipe and “ O“ ring if damaged. Replace transmission oil filter if
blockage or restrictions are suspected.
Step 4.
Remove, clean, and inspect vacuum modulator assembly and modulator valve.
(See paragraph 5-3)
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