T M 9 - 2 3 2 0 - 2 7 9 - 3 4 - 1
Troubleshooting Malfunctions (Cont)
T a b l e 2 - 3 . T r o u b l e s h o o t i n g ( C o n t)
Test or Inspection
T R A N S M I S S I O N ( C O N T )
T R A N S M I S S I O N W I L L N O T S H I F T I N T O G E A R , S L I P S O U T O F G E A R , O R O P E R A T ES
E R R A T I C A L L Y .
Step 1. Check for low main pressure. Remove line from main pressure port on transmission and
install tee and 0 to 300 psi (0 to 2 070 kPa) gage. Start engine and allow to run at idle speed.
With parking brake applied, shift transmission into DRIVE. Check for 105 to 140 psi (725 to
965 kPa) main system pressure.
If pressure is 105 to 140 psi (725 to 965 kPa), go to step 4.
Step 2. Check for clogged internal filter element. Remove oil pan (para 7-11)
If internal filter element is clogged, replace internal filter element (para 7-12).
Step 3. Check for damaged or missing preformed packing on internal filter pickup tube.
If preformed packing is damaged or missing, replace preformed packing and gasket
If preformed packing is not damaged or missing, disassemble transmission and
inspect oil pump, main pressure regulator valve, control valve body for leakage or
sticking valves (para 7-8, 7-9, 7-20).
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