Chevrolet Silverado / GMC Sierra. Manual — part 1030
TORQUE CONVERTER CLUTCH SHUDDER
Torque Converter Clutch Shudder
Converter clutch valve stuck or assembled backward
Transmission Fluid Pressure
Manual Valve Position
Switch (69)
Contamination
Damaged seals
Solenoid Screen
(367A/367B)
Blocked
TCC Solenoid Valve (Part
of 66)
Internal damage
Engine Speed Sensor
Internal damage
Engine Coolant Temperature
Sensor
Internal damage
Automatic Transmission
Fluid Temperature Sensor
(Part of 69)
Internal damage
Brake Switch
Internal damage
TCM
Internal damage
TCC PWM Solenoid (Part
of 66)
Internal damage
Checks
Causes
Miscellaneous
Low oil presure
Engine not tuned properly
Contaminated transmission oil
Oil Filter (72)
Crack in filter body
Flash restricting filter neck
O-ring seal (71) cut or damaged
Torque Converter Assembly
(1)
Internal damage
Broken weld or missing weight
Oil Pump Assembly (4)
Converter clutch valve (224) stuck
Restricted oil passage
Input Housing and Shaft
Assembly (621)
Turbin shaft O-ring (618) cut or damaged
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
NO TORQUE CONVERTER CLUTCH RELEASE
No TCC Release
TORQUE CONVERTER CLUTCH SLIP - 100 RPM SLIP
TCC Slip (100 RPM)
TORQUE CONVERTER CLUTCH SLIP WITH STALL/STUMBLE
TCC Slip with Stall/Stumble
Turbin shaft retainer and ball assembly (617) restricted
or damaged
Checks
Causes
TCC Solenoid Valve (Part
of 66)
External ground
Clogged exhaust orifice
Converter (1)
Internal damage
Valve Body Assembly (60) The converter clutch apply valve is stuck in the apply position
Oil Pump Assembly (4)
The converter clutch valve is stuck
PCM/TCM
External ground
Checks
Causes
Valve Body Assembly (60)
TCC/PWM solenoid leaks
Regulator apply valve or converter clutch shift valve
sticking or side loading
Oil Pump Assembly (4)
Stator shaft bushings worn, due to scratched turbine shaft
journal (replace bushings and input housing assembly)
TCC apply valve is stuck open
TCC solenoid leaking
Input Housing and Turbine
Shaft Assembly (621)
Scratched journal on turbine shaft
Turbine shaft O-ring cut
Turbine shaft hole not drilled to full depth
Checks
Causes
TCC Apply Valve (Part of
66)
Stuck open
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
TORQUE CONVERTER CLUTCH INTERMITTENT - OK COLD/SLIPS HOT
Intermittent TCC OK Cold/Slips Hot
NO FOURTH GEAR, OR SLIPS IN FOURTH GEAR
No 4th or Slipping 4th
SLIP/FLARE IN ANY GEAR
Slip/Flare in any Gear
NO THIRD GEAR
No 3rd
DRIVES IN NEUTRAL
Drives in Neutral
Checks
Causes
TCC PWM Solenoid (396) Leaks
Regulator Apply Valve
(216)
Sticking valve
Converter Clutch Shift
Valve (224)
Sticking valve
Checks
Causes
Checkball #2, 4, 8 or 12
Valve body checkball in wrong location or an additional
checkball is installed. Refer to Control Valve Body
Installation.
Orificed Cup Plug (240)
Not fully pressed into pump cover. Refer to Oil Pump Stator
Shaft Bushing Replacement.
Checks
Causes
Pump Slide Spring (245)
Omitted, weak or broken
Checks
Causes
Orificed Cup Plug (698)
Missing or blown out
Checks
Causes
Forward Clutch (446-451)
The clutch does not release
Manual Valve Link (89)
Disconnected
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
SECOND GEAR START
Second Gear Start
NO PARK
No Park
Case (103)
The face is not flat
Internal leakage exists
Checks
Causes
Signal Noise on Vehicle
Speed Sensor (VSS) Circuit
Chassis vibrations, incorrect harness routing, owner installed
electronic components creating electrical interference.
Diagnostic Trouble Code
(DTC)
Electrical or mechanical 1-2 Shift Solenoid Valve (367)
malfunction.
Sediment in the valve body may cause improper
transmission fluid pressure (TFP) operation.
Leaking Actuator Feed
Limit (AFL) Circuit
Spacer plate (48), spacer plate gaskets (47 or 52), control
valve body (60), mispositioned, damaged or poor
sealing/mating surface exist.
Blocked or restricted Valve
Body Spacer Plate (48)
Spacer Plate to Case Gasket
(47) or Spacer Plate to
Valve Body Gasket (52)
Trapped sediment or metal particles.
Stuck 1-2 Shift Valve (366)
Trapped sediment or metal particles.
Binding shift valve or worn valve body bore.
TFP manual valve position
switch (69)
TFP manual valve position switch (69) erratic operation.
Checks
Causes
Parking Lock Actuator
Linkage (85-90)
Actuator rod assembly bent or damaged
Actuator rod spring binding or improperly crimped
Actuator rod not attached to inside detent lever
Parking lock bracket damaged or not torqued properly
Inside detent lever not torqued properly
Parking pawl binding or damaged
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
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