Hummer H2. Manual - part 2560

Fig. 210: Identifying Pump Slide Components 
Courtesy of GENERAL MOTORS CORP. 

6. Remove the pump slide (203), pump slide support seal (208) and the pump slide seal (209).  

7. Remove the slide seal back-up O-ring seal (202) and the oil seal - slide to wear plate, ring (201).  

8. Remove the pivot slide pin (205) and the pivot pin spring (204).  

OIL PUMP ROTOR AND SLIDE MEASUREMENT 

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E

  

Fig. 211: Measuring Oil Pump Rotor & Slide 
Courtesy of GENERAL MOTORS CORP. 

z

Refer to Oil Pump Rotor and Slide Measurement .  

z

Measure the oil pump rotor (212) thickness.  

z

Measure the oil pump slide (203) thickness.  

OIL PUMP BODY BUSHING REPLACEMENT 

Removal Procedure 

Tools Required 

z

J 41778-1 Pump Body Bushing Installer/Remover. See Special Tools and Equipment . 

IMPORTANT: Measure the rotor and slide thickness for surface wear. The rotor and 

slide measurements must both fall into the same thickness range. If the 
rotor and slide measurements do not fall into the same thickness range, 
or are outside of all the ranges, the oil pump must be replaced as an 
assembly.

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E

  

z

J 41778-2 Pump Body Bushing Position Stop. See Special Tools and Equipment .  

Fig. 212: Identifying Oil Pump Body Inspection Areas 
Courtesy of GENERAL MOTORS CORP. 

1. Inspect the oil pump body for the following defects: 

z

Worn or damaged bushings  

z

Foreign material or debris  

z

Porosity  

z

Scored or irregular mating faces  

z

Cross channel leaks  

z

Ring groove damage  

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E

  

Fig. 213: Locating Front Helix Retainer & Oil Seal Assembly 
Courtesy of GENERAL MOTORS CORP. 

2. Remove the front helix retainer (244).  

3. Remove the oil seal assembly (243). 

 

2004 Hummer H2 

2004 TRANSMISSION/TRANSAXLE Automatic Transmission - Overhaul - 4L60-E/4L65-E