Content .. 1136 1137 1138 1139 ..
Chevrolet Silverado / GMC Sierra. Manual - part 1138
Fig. 420: Identifying Oil Pump Rotor & Pump Vane Rings
Courtesy of GENERAL MOTORS CORP.
3. Remove the oil pump rotor (212) and pump vane rings (210).
4. Remove the pump vanes (213).
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
5. Remove the rotor guide (211).
Fig. 421: Identifying Oil Pump Slide, Pump Slide Support Seal & Pump Slide Seal
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).
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
OIL PUMP ROTOR AND SLIDE MEASUREMENT
Fig. 422: Measuring Oil Pump Rotor & Slide
Courtesy of GENERAL MOTORS CORP.
Refer to Oil Pump Rotor and Slide Measurement .
Measure the oil pump rotor (212) thickness.
Measure the oil pump slide (203) thickness.
OIL PUMP BODY BUSHING REPLACEMENT
Tools Required
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.
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
J 41778-1 Pump Body Bushing Installer/Remover. See Special Tools.
J 41778-2 Pump Body Bushing Position Stop. See Special Tools.
Replacement
Fig. 423: Inspecting Oil Pump Body
Courtesy of GENERAL MOTORS CORP.
1. Inspect the oil pump body for the following:
Worn or damaged bushings
Foreign material or debris
Porosity
Scored or irregular mating faces
Cross channel leaks
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis
Silverado, Sierra & Silverado
Content .. 1136 1137 1138 1139 ..