Pontiac Fiero 1988 Service Manual page 751

125C-10 HYDRAULIC DIAGNOSIS
CONDITION INSPECT COMPONENT FOR CAUSE
NO 2-3 SHIFT OR 2-3
SHIFT DELAYED
(Continued)
• Case Cover
• Throttle Lever & Bracket
Assembly
• T.V. Link
• Control Valve Assembly
• Spacer Plate
• Case To Governor Shaft
Sleeve
• Direct Clutch
— Case cover bolts loose.
— Driven sprocket support passages inter-
connected, leaking, or restricted.
— Driven sprocket support oil seal rings dam-
aged or missing.
— Sleeve loose or out of position.
— Binding.
— Wrong, unhooked or binding T.V. link.
— 2-3 shift valve, 2-3 T.V. valve sticking.
— Shift T.V. valve sticking.
— Governor feed to 2-3 shift valve restricted.
— Direct clutch feed orifice restricted.
— #5 check ball missing or mislocated.
— Spacer plate or gaskets leaking, damaged
or incorrectly installed.
— Damaged or missing.
— Check ball leaking.
— Check ball capsule damaged.
— Seals damaged/missing.
— Cracked/damaged housing or piston.
— Backing plate snap ring out of groove.
— Clutch plates damaged/missing.
DELAY IN DRIVE AND
REVERSE
• Oil Level
• Oil Pressure
• Converter, Drive Sprocket
Support Bushings
• Turbine Shaft
— Incorrect level.
— Check cause of low oil pressure.
— Converter drainback.
— Scarf seals damaged or leaking.
NO DRIVE IN DRIVE OR
INTERMEDIATE RANGE
(Lo & Reverse OK)
• Lo Roller Clutch — Springs missing.
— Rollers galled or missing.
NO DRIVE IN FORWARD
RANGES (Reverse Ties Up)
• Driven Sprocket Support
— Sleeve turned.
NO DRIVE IN ALL RANGES ® Oil Level
• Torque Converter
• Oil Pressure
• Differential
— Incorrect level.
— Converter to flex plate bolts missing.
— Pressure regulator valve sticking in
bushing.
— Worn pump seals.
— Oil pump shaft broken.
— Differential damaged/broken up.
H 125C-354
Figure 8 Diagnosis Chart