Hummer H2. Manual — part 2346

Fig. 411: Bore Plug Retainer, Bore Plug, 3-4 Shift Valve Spring & 3-4 Shift Valve
Courtesy of GENERAL MOTORS CORP.

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

26. Remove the 3-4 shift valve spring (386) and the 3-4 shift valve (385).

CAUTION: Refer to Valve Springs Can Be Tightly Compressed Caution in

Cautions and Notices.

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 412: Bore Plug Retainer, Bore Plug, Regulator Apply Valve, Regulator Apply Spring &
Isolator 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).

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 413: Bore Plug Retainer, Bore Plug, 3-4 Relay Valve, 4-3 Sequence Valve & 4-3 Sequence
Valve Spring
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

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2

Fig. 414: Inspecting Valve Body Casting
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:

z

Porosity

z

Cracks

z

Damaged machined surfaces

z

Chips or debris

2004 Hummer H2

2004 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E (Introduction) - Hummer H2