TM 9-2320-289-34
Table 2-1. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
63. SLIPS IN SECOND OR SHIFTS 1-3 (MISSES SECOND)
Step 1.
Remove, disassemble, clean, and inspect intermediate clutch assembly. (See
paragraph 5-1 9)
Step 2.
Inspect center support assembly, intermediate clutch, and intermediate clutch
piston seals. (See paragraph 5-1 9)
64. UPSHlTS PROPERLY; WILL NOT DOWNSHIFT
Step 1.
Step 2.
Step 3.
Disconnect downshift electrical connector from side of transmission. Connect test
light to terminal and ground. Turn key to “RUN” position. Have assistant depress
accelerator pedal fully.
If test light lights, check for loose or damaged detent solenoid. Tighten if
loose and replace if damaged. (See paragraph 5-7)
If test light does not light, perform step 2.
Trace circuit from transmission downshift switch on side of accelerator cable
bracket. (See wiring diagram E-4 or E-6)
If circuit is good, replace transmission downshift switch.
Remove, disassemble, clean, and inspect transmission control valve assembly.
(See paragraph 5-7)
65. NO ENGINE BRAKING WITH TRANSMISSION GEARSHIFT SELECTOR IN “2”
Step 1.
Step 2.
660 NO ENGINE
Step 1.
Step 2.
Step 3.
Remove, disassemble, clean, and inspect front servo assembly. (See paragraph
5-10)
Remove, disassemble, clean, and inspect direct clutch assembly and front band.
(See paragraph 5-1 7)
BRAKING WITH TRANSMISSION GEARSHIFT SELECTOR IN “1“
Remove transmission control valve assembly. (See paragraph 5-7) Check to see if
any check balls are missing or mispositioned, Inspect for damage at check ball
seat pockets in transmission case.
Install check balls in correct position if missing or mispositioned.
Transmission case must be replaced if check ball seat pockets are damaged.
Remove, disassemble, clean, and inspect rear servo assembly. (See paragraph
5-9)
Remove and inspect rear band. (See paragraph 5-1 9)
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