TM 9-2520-272-34-P
24. MALFUNCTION, TEST OR INSPECTION, AND CORRECTIVE ACTION PROCEDURES
(Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
8.
TRANSMISSION DOES NOT UPSHIFT
PRELIMINARY TROUBLESHOOTING. Organization maintenance determined:
• Throttle modulator and associated linkage operated properly.
• Throttle valve (TV) pressure was outside of specified limit.
Step 1.
Replace control valve assembly in accordance with para. 4-5 and
check TV pressure in accordance with para. 2-6 with engine running at
2500 rpm and shift lever at N.
TV pressure must be 91-97 psi (627-669
kPa).
a. If TV pressure is within limits, go to Step 2.
b. If TV pressure is outside of specified Iimits replace separator plate and
gasket in accordance with para. 4-5 and check TV pressure in accordance
with para. 2-6 with engine running at 2500 rpm and shift lever at N. TV
pressure must be 91-97 psi (627-669 kPa). GO to step 2.
Step 2. Check vehicle operation
9.
TRANSMISSION DOES NOT DOWNSHIFT
PRELIMINARY TROUBLESHOOTING. Organizational maintenance determined:
• Governor two (G2) pressure was normal.
Step 1.
Replace control valve assembly in accordance with para. 4-5.
Step 2. Check vehicle operation
10.
TRANSMISSION SHIFTS ARE ERRATIC
PRELIMINARY TROUBLESHOOTING. Organizational maintenance determined:
• With throttle modulator and associated linkage operating
properly, TV pressure increased erratically as throttle was
increased, or,
• Throttle modulator and associated linkage, TV pressure, and
governor two (G2) pressure were normal with original symptom
still present.
Step 1.
Replace control valve assembly in accordance with para. 4-5.
Step 2
Check vehicle operation.
a. If vehicle operation is normal, return vehicle to service.
b. If vehicle shifts remain erratic, transmission is defective beyond the level
of Direct Support Maintenance.
Separate transmission in accordance with
TM 9-1450-300-34 or TM 9-2350-277-34 and send to General Support.
2-12
Para. 2-4
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