Hummer H3. Manual — part 737

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

SECOND GEAR START

Second Gear Start

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

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

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

NO PARK

No Park

OIL OUT THE VENT

Oil Out the Vent

VIBRATION IN REVERSE AND WHINING NOISE IN PARK

Vibration in Reverse and Whining Noise in Park

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

Checks

Causes

Oil Pump (4)

Chamber in pump body rotor pocket

Miscellaneous

Fluid level-overfilled

Checks

Causes

Oil Pump (4)

Chamber in pump body rotor pocket

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

RATCHETING NOISE

Ratcheting Noise

TICKING NOISE IN REVERSE

Ratcheting Noise

POPPING NOISE

Popping Noise

WHINE NOISE VARYING WITH RPM OR FLUID PRESSURE

Whine Noise Varying with RPM or Fluid Pressure

Miscellaneous

Fluid level-overfilled

Checks

Causes

Parking Brake Pawl (50-81) The parking pawl return spring is weak, damaged or

misassembled

Checks

Causes

Parking Brake Pawl (50-81) This noise may be caused by a bent parking lock actuator

assembly (85). A bent actuator may not fully move the pawl
(81) away from the internal reaction gear (684) when in
reverse allowing the pawl to lightly contact the teeth of the
internal reaction gear. The condition my not occur in forward
gears as the additional actuator travel moves the pawl further
from the gear teeth.
To correct this condition, replace the parking lock actuator
assembly (85).

Checks

Action

DEFINITION: A popping noise, similar to popcorn popping
Oil Pump System

Check fluid level.

Inspect for pump cavitation, indicated by bubbles in
fluid.

Inspect the transmission fluid filter for a leaky seam.

Inspect the transmission fluid filter seal for improper
positioning or for a cut seal.

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3

BUZZ NOISE OR HIGH FREQUENCY RATTLE SOUND

Buzz Noise or High Frequency Rattle Sound

NOISE IN RANDOM RANGES

Noise in Random Ranges

NO DRIVE IN ALL RANGES

No Drive in All Ranges

Checks

Action

DEFINITION: In all ranges, a whine which may be sensitive to RPM load or which ceases
when the TCC engages or which is sensitive to the oil pressure
Torque Converter (1)

Verify that the noise is internal to the torque converter by
placing your left foot on the brake with the gear or selector in
Drive. Momentarily stall the engine. Torque Converter noise
increases under load.

Oil Pump System

Verify that the noise is internal to the oil pump during a
preliminary oil pressure check. An increase in line pressure
will vary an oil pump noise.

Checks

Action

DEFINITION: A buzz or high frequency rattle

Trace Cooler Pipes

Check for binding or
contact at the
Radiator, other than at
the Cooler Pipe
connectors

Verify a pressure buzz by watching for a needle vibration of
the pressure gage. A road test may be necessary. Refer to
Road Test.

Checks

Action

DEFINITION: Noise only in certain gear ranges
Refer to Range Reference . Determine the power flow and the applicable components that
may be causing this noise.

Checks

Causes

Low Transmission Fluid
Level

Transmission or cooler line leak

Oil Pump (4)

Damaged oil pump rotor (212)

2007 Hummer H3

2007 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - H3