TM-9-2320-280-34
TRUCK, UTILITY: M998 SERIES
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
JANUARY 1996
TM-9-2320-280-34 - Page 939 of 1258
TM 9-2320-280-34
17-32.
TRANSMISSION OIL PRESSURE TESTS (3L80) (Cont ’d)
13.
Compare oil pressure test results to information in table 17-9.
If malfunction is still unknown,
consult troubleshooting, table 2-1.
Table 17-9.
Oil Pressure Diagnosis
Test Conditions
Drive
Drive*
Check
1,000
rpm
2,000
rpm
Transmissio
n
Neutral
Drive
Drive
Low 2
Low 1
Reverse
Kick-
down
closed
for
1,000
rpm
idle
1,000
rpm
1,000
rpm
1,000
rpm
1,000
rpm
switch
activated
throttle
Malfunctions
in
Detent
Normal
High
High
Normal
Normal
Normal
Normal
High
System
High
High
High
Normal
Normal
High
**
**
Modulator
System
Test
Direct Clutch
Results
Normal
Normal
Normal
Normal
Normal
Low
Normal
Normal
Oil Feed
Forward
Normal
Low to
Low to
Low to
Low to
Normal
Low to
Low to
Clutch Oil
Normal
Normal
Normal
Normal
Normal
Normal
Feed
Detent
Normal
Normal
Normal
Normal
Normal
Normal
Low
Normal
System
* Modulator cable and linkage held in full throttle position.
** Oil pressure not important under test condition indicated.
14.
Remove oil pressure gauge from transmission (1) and install pipe plug (3) in line pressure port (2).
17-152
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