Hummer H3. Manual — part 1466

Transmission Disassemble.

Did you find and repair the condition?

Go to Step 31

Go to Diagnostic

Aids

21

Is the leak at the vehicle speed sensor
(VSS)?

Go to Step 22

Go to Step 23

22

1. Remove the VSS. Refer to Vehicle

Speed Sensor Replacement.

2. Inspect for the following conditions:

Cut or damaged O-ring seal

VSS over tightened causing
deformation in the VSS

VSS bore scratched or damaged

Did you find and repair the condition?

Go to Step 31

Go to Step 1

23

Is the leak at the backup lamp switch?

Go to Step 24

Go to Step 25

24

1. Remove the backup lamp switch.

Refer to Backup Lamp Switch
Replacement.

2. Inspect for the following conditions:

Cross threaded or damaged
threads

Insufficient sealant

Leaking switch

Improper installation

Did you find and repair the condition?

Go to Step 31

Go to Step 1

25

Is the leak at the shift shaft detent plugs?

Go to Step 26

Go to Step 27

26

1. Remove the shift shaft detent plugs.

Refer to Transmission Disassemble
and Transmission Assemble.

2. Inspect for the following conditions:

Cross threaded or damaged
threads

Insufficient sealant

Cracked case

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

REPAIR INSTRUCTIONS - ON VEHICLE

TRANSMISSION FLUID REPLACEMENT

Draining Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

Improper installation

Did you find and repair the condition?

Go to Step 31

Go to Step 1

27

Is the leak at the sealing flanges of the
transmission cases?

Go to Step 28

Go to Step 29

28

1. Remove the transmission. Refer to

Transmission Replacement.

2. Disassemble the transmission. Refer

to Transmission Disassemble.

3. Inspect the sealing surfaces. Refer to

Transmission Case Cleaning and
Inspection.

Did you find and repair the condition?

Go to Step 31

Go to Step 29

29

Is the leak coming from a crack or porosity
in the transmission case?

Go to Step 30

Go to Diagnostic

Aids

30

1. Remove the transmission. Refer to

Transmission Replacement.

2. Disassemble the transmission. Refer

to Transmission Disassemble.

3. Replace the faulty case. Refer to

Transmission Extension Assemble
or Transmission Case Assemble or

Transmission Assemble

.

Did you find and repair the condition?

Go to Step 31

Go to Diagnostic

Aids

31

Operate the system in order to verify the
repair.
Did you correct the condition?

System OK

Go to Step 1

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 10: View Of Drain Plug
Courtesy of GENERAL MOTORS CORP.

2. Clean away all dirt and debris from the transmission fluid drain plug area.

3. Position an appropriate container under the transmission.

4. Remove the transmission fluid drain plug and washer.

Discard the washer.

Allow the transmission fluid to drain into the container.

NOTE:

Refer to Component Fastener Tightening Notice .

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

5. Install the transmission fluid drain plug and NEW washer.

Tighten: Tighten the drain plug to 37 N.m (27 lb ft).

6. Remove the container used to catch the used transmission fluid from under the vehicle.

Filling Procedure

Fig. 11: View Of Transmission Fluid Fill Plug & Washer
Courtesy of GENERAL MOTORS CORP.

1. Clean away all dirt and debris from the transmission fluid fill plug area.

2. Remove the transmission fluid fill plug and washer.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3