4-5-6 Clutch Overhaul. Chevrolet Avalanche

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2007 🢒 Avalanche - 2WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 4-5-6 Clutch Overhaul

4-5-6 Clutch Overhaul 6L80

Table 1:	4-5-6 Clutch Plates Removal
Table 2:	4-5-6 Clutch Piston Removal
Table 3:	Turbine Shaft Fluid Seal Ring Replacement
Table 4:	4-5-6 Clutch Piston Installation
Table 5:	4-5-6 Clutch Plates Installation

4-5-6 Clutch Plates Removal

4-5-6 Clutch Plates Removal

Callout	Component Name
1	4-5-6 Clutch Backing Plate Retaining Ring
2	4-5-6 Clutch Backing Plate
3	4-5-6 Clutch Plate Assembly (Qty: 6)
4	4-5-6 Clutch Plate (Qty: 6)
5	4-5-6 Clutch (Waved) Plate

4-5-6 Clutch Piston Removal

4-5-6 Clutch Piston Removal

Callout	Component Name
1	4-5-6 Clutch Piston Dam Retaining Ring Notice: Use care when compressing the 4-5-6 clutch piston assembly, spring and dam assembly. Compressing the dam assembly too much may damage it. Notice: Refer to Retaining Ring Reuse Notice in the Preface section. Special Tool J 43074 Clutch Spring Compressor
2	4-5-6 Clutch Piston Dam Assembly Tip It may be necessary to apply air pressure to remove the dam and piston.
3	4-5-6 Clutch Spring
4	4-5-6 Clutch Piston Assembly Tip It may be necessary to apply air pressure to remove the piston.

Turbine Shaft Fluid Seal Ring Replacement

Turbine Shaft Fluid Seal Ring Replacement

Callout

Component Name

Preliminary Procedures

•	Inspect the turbine shaft fluid passages and splines.

•	Clean any plugged passages.

Turbine Shaft Fluid Seal Ring (Qty: 3)

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

Notice: Size the fluid seal rings for at least 5 minutes after installation to obtain proper seal ring size. Failure to do so may cause internal transmission leaks and transmission damage.

Tip
Adjust the turn screw on DT 47768-1 and install the bottom seal ring first.

Special Tools

•	DT 47768-1 Seal Protector

•	DT 47768-2 Seal Pusher

•	DT 47768-3 Seal Sizer

4-5-6 Clutch Piston Installation

4-5-6 Clutch Piston Installation

Callout	Component Name
1	4-5-6 Clutch Piston Assembly
2	4-5-6 Clutch Spring Notice: Ensure the spring tabs are facing up during installation. Failure to do so may cause damage to the clutch assembly.
3	4-5-6 Clutch Piston Dam Assembly Tip Lubricate the inner and outer sealing surfaces of the dam assembly with automatic transmission fluid (ATF) in order to ease installation into the piston.
4	4-5-6 Clutch Piston Dam Retaining Ring Notice: Use care when compressing the 4-5-6 clutch piston assembly, spring and dam assembly. Compressing the dam assembly too much may damage it. Notice: Refer to Retaining Ring Reuse Notice in the Preface section. Tip Apply air to verify proper installation of all 4-5-6 clutch components. The piston should apply and release smoothly. Special Tool J 43074 Clutch Spring Compressor

4-5-6 Clutch Plates Installation

4-5-6 Clutch Plates Installation

Callout	Component Name
1	4-5-6 Clutch (Waved) Plate
2	4-5-6 Clutch Plate (Qty: 6)
3	4-5-6 Clutch Plate Assembly (Qty: 6)
4	4-5-6 Clutch Backing Plate
5	4-5-6 Clutch Backing Plate Retaining Ring Tip After the retaining ring is installed, determine clutch piston travel in order to verify if the correct selective retaining ring is being used. Refer to 4-5-6 Clutch Backing Plate Retaining Ring Measurement .