Chevrolet Silverado / GMC Sierra. Service manual — part 798

TORQUE CONVERTER HOUSING WITH FLUID PUMP DISASSEMBLE

Fig. 168: Torque Converter Housing with Fluid Pump Disassemble
Courtesy of GENERAL MOTORS CORP.

1 . See Special Tools.

Special Tools

DT 47868-1 Clutch Pack Travel Weight. See Special Tools.

DT 47868-2 Magnetic Base Adapter. See Special Tools.

J 8001 Dial Indicator Set

J 26900-13 Magnetic Base

1

3-5 Reverse Clutch Apply Passage
Tip: Apply compressed air to the apply passage
hole, and observe the dial indicator measurement.
Refer to Clutch Backing Plate Retaining Ring
Specifications (6L80) or Clutch Backing Plate
Retaining Ring Specifications (6L90) .

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

FLUID PUMP COVER CLEANING AND INSPECTION

Callout

Component Name

NOTE:

Do not loosen or remove the 6 bolts securing the clutch support to the pump cover assembly.
These bolts have been installed and torqued only after specific clutch support rotational
requirements have been met. If the clutch support is not installed properly, damage to the
transmission will occur.

1

1-2-3-4 and 3-5 Reverse Clutch Housing Thrust
Washer

2

Bolt M6 x 40 (Qty: 13)

3

Fluid Pump Cover Assembly

4

Fluid Pump Vane Ring

5

Fluid Pump Rotor

6

Fluid Pump Vanes (Qty: 13)

7

Fluid Pump Rotor Guide

8

Fluid Pump Vane Ring

9

Fluid Pump Slide Outer Spring

10

Fluid Pump Slide

11

Fluid Pump Slide (O-Ring) Seal

12

Fluid Pump Slide Fluid Seal Ring

13

Fluid Pump Slide Seal

14

Fluid Pump Slide Seal Support

15

Fluid Pump Slide Pivot Pin

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 169: Fluid Pump Cover Cleaning and Inspection
Courtesy of GENERAL MOTORS CORP.

Callout

Component Name

Preliminary Procedure: Clean and inspect all components and machined surfaces.

CAUTION:

Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal
injury could result.

1

Pressure Regulator Valve Train

2

Converter Feed Limit Valve Train

3

Pressure Relief Ball Valve and Spring

4

TCC Control Valve and Spring

1-2-3-4 and 3-5 Reverse Clutch Fluid Seal
Rings (Qty: 3)

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

TORQUE CONVERTER HOUSING CLEANING AND INSPECTION

Fig. 170: Torque Converter Housing Cleaning and Inspection
Courtesy of GENERAL MOTORS CORP.

5

NOTE:

Do not use old seal rings. Install NEW seal rings.
Reusing old seal rings may cause internal
transmission leaks and transmission damage.

6

A/Trans Fluid Pump Locator Pin

Callout

Component Name

Preliminary Procedures

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado