Hummer H3. Manual — part 818

Fig. 316: Locating Forward Clutch Housing O-Ring Seal
Courtesy of GENERAL MOTORS CORP.

1. Install a new input to forward clutch housing O-ring seal (622).

2007 Hummer H3

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

Fig. 317: Identifying 3rd & 4th Clutch Piston Inspection Areas
Courtesy of GENERAL MOTORS CORP.

2. Inspect the 3rd and 4th clutch piston (623) for the following conditions:

Porosity or damage

Seal damage

3. Install the 3rd and 4th clutch piston (623) into the input housing.

2007 Hummer H3

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

Fig. 318: Forward Clutch Housing Inspection Areas
Courtesy of GENERAL MOTORS CORP.

4. Inspect the forward clutch housing (628) for the following conditions:

Proper check ball operation

Damage or distortion

Burrs in the seal areas

Cracks

2007 Hummer H3

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

Fig. 319: Inspecting Forward Clutch Piston For Damage Or Wear
Courtesy of GENERAL MOTORS CORP.

5. Inspect the forward clutch piston for the following conditions:

Porosity or damage

Seal damage

Apply leg damage

2007 Hummer H3

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