TM 9-2320-387-24-2
Table 14-1. Mechanical lkoubleshooting
(Cont’d).
1
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TEST OR INSPECTION
19. l-2 SHIFT FIRM OR ROUGH
Step 1.
step 2.
Step 3.
step 4.
Step 5.
Step 6.
step 7.
If oil pressure in @) (overdrive) at 1,000 rpm is normal, proceed to step 2. If oil pressure
is high, proceed to step 6.
Check l-2 accumulator valve train for stuck valves or incorrect assembly. Replace control
valve (para. 28-17) if any damage is found.
Check rear accumulator piston and oil seal rings for damage. Repair rear servo
(para. 28-16) if damaged.
Check transmission case for restricted oil passages, damage, or porosity. Remove
obstructions or replace transmission (para. 19-3) if case is damaged or porous.
Check for missing or incorrectly installed check balls. Replace missing check balls
(chapter 28).
Check control valve spacer plate for obstructions and damaged or misaligned gasket.
Clean or replace spacer plate (chapter 28).
Check oil pump for obstructed oil passages or damage. Repair oil pump (para. 28-18) if
damaged.
END OF TESTING!
20. NO 2-3 UPSHIFT OR DEWED UPSHIFT
NOTE
If malfunction only occurs at or near full throttle, check engine
timing for proper adjustment and check exhaust system for
restrictions.
step 1.
Check control valve for a stuck 2-3 valve, and misaligned or damaged gaskets. Replace
control valve (chapter 28) if damaged.
Step 2.
Check direct clutch for damage or burned clutch plates. Repair direct clutch (para. 28-10)
if damaged.
END OF TESTING!
2 1. 2-3 SHIFT
SOFT OR SUPS
step 1.
If oil pressure in @
(overdrive) at 1,000 rpm is low, proceed to step 2. If oil pressure is
normal, proceed to step 3.
step 2.
Perform steps 3 through 8 of malfunction 18.
step 3.
Perform steps 6 and 7 of malfunction 19.
step 4.
Check front servo for broken or missing spring and leak at servo pin. Repair front servo
(para. 28-15) if damaged.
WARNING
Compressed air used for cleaning purposes will not exceed 30 psi
(207 kPa). Use only with effective chip guarding and personnel
protective equipment (goggles, shield, gloves, etc.).
step 5.
Air-check direct clutch piston for proper operation. If piston exhibits excessive leakage,
proceed to step 6. If operation is normal, proceed to step 7.
14-10
