Chevrolet Silverado / GMC Sierra. Manual

3. Install the forward clutch waved plate (648).

4. Install the forward clutch steel plates (649A) and alternate with the fiber plate assemblies

(649B).

5. Install the forward clutch selective backing plate (650).

6. Install the forward clutch backing plate retainer ring (651).

FORWARD CLUTCH PISTON TRAVEL CHECK

Fig. 388: Measuring Forward Clutch Plate Travel
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

1. Use feeler gauges to check the forward clutch plate travel. Check travel between the

forward clutch backing plate retainer ring (651) and the forward clutch selective backing
plate (650).

The forward clutch plate travel should be:

Specification: 0.876-1.866 mm (0.034-0.073 in)

2. Select the proper forward clutch selective backing plate (650) to obtain the correct travel.

Refer to Forward Clutch Backing Plate Selection .

3-4 CLUTCH ASSEMBLE

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Fig. 389: View Of Inspection Areas On Clutch Apply Plates
Courtesy of GENERAL MOTORS CORP.

1. Inspect the 3rd and 4th clutch apply plate (653), the fiber plate assemblies (654A), the steel

plates (654B) and the selective backing plate (655) for the following conditions:

Damaged tangs

Delamination

Excessive wear

Heat damage or wear

IMPORTANT: The part 654A may have 5, 6 or 7 plates.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

Surface finish

Flatness

Fig. 390: View Of Clutch Apply Plates And Input Housing
Courtesy of GENERAL MOTORS CORP.

2. Install the 3rd and 4th clutch apply plate (653) into the input housing. Index each leg of the

apply plate into the apply ring legs.

NOTE:

The correct number of fiber plates must be used to avoid
damage to the transmission. An incorrect stack up height can
cause either excessive clutch slippage or insufficient release,
resulting in burned clutch plates.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis

Silverado, Sierra & Silverado

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Chevrolet Silverado / GMC Sierra. Manual - part 1129