Hummer H3. Manual — part 847

Fig. 422: Identifying Isolator Valve & Regulator Apply Valve
Courtesy of GENERAL MOTORS CORP.

27. Remove the bore plug retainer (395) and the bore plug (381).

28. Remove the regulator apply valve (380) and the regulator apply spring (397) and the

isolator valve (398).

2007 Hummer H3

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

Fig. 423: View Of 4-3 Sequence Valve & 3-4 Relay Valve
Courtesy of GENERAL MOTORS CORP.

29. Remove the bore plug retainer (395) and the bore plug (381).

30. Remove the 3-4 relay valve (384) and the 4-3 sequence valve (383) and the 4-3 sequence

valve spring (382).

CONTROL VALVE BODY ASSEMBLE

Inspection Procedure

2007 Hummer H3

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

Fig. 424: Inspecting Control Valve Body For Channel Witness Marks
Courtesy of GENERAL MOTORS CORP.

1. Inspect the valve body to spacer plate gasket for valve body channel witness marks. The

witness marks should be complete. Incomplete witness marks may be caused by an uneven
case surface. Incomplete witness marks may also be caused by cross-channel leaks.

2. Inspect the valve body casting for the following conditions:

Porosity

Cracks

Damaged machined surfaces

2007 Hummer H3

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

Chips or debris

Cleaning Procedure

1. Clean all the valves, springs, bushings and the control valve body in clean solvent.

2. Dry all the parts using compressed air.

Installation Procedure

Fig. 425: Identifying Isolator Valve & Regulator Apply Valve
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to Valve Springs Can Be Tightly Compressed

2007 Hummer H3

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