Chevrolet Silverado / GMC Sierra. Manual — part 936

81. Install the input sun gear (3) with the input sun gear flange (2) into the 1-2-3-4, 4-5-6 clutch

housing (4).

82. Install the input sun gear external retaining ring (1) into the 1-2-3-4, 4-5-6 clutch housing

(4).

83. Make sure the retaining ring is seated all the way around the 1-2-3-4, 4-5-6 clutch housing.

84. Remove tools J 24204-2 and J 43777 . See Special Tools.

INPUT SUN GEAR THRUST WASHER INSPECTION

Fig. 322: Measuring Thickness Of Input Sun Gear Thrust Washer
Courtesy of GENERAL MOTORS CORP.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

1. Measure the thickness of the 1-2-3-4, 4-5-6 clutch thrust washer (1) at dimension A.

Specification: The thrust washer minimum thickness is 2.59 mm (0.102 in).

2. Replace the thrust washer if the specifications are not met.

TRANSMISSION FLUID FILLER TUBE PLUG AND TRANSMISSION CASE LOCATING PIN
REPLACEMENT

Tools Required

J 43780 Transmission Case Locating Pin Installer. See Special Tools.

Transmission Case Fill Plug Replacement

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

Fig. 323: Identifying Transmission Fill Tube Seal & Plug
Courtesy of GENERAL MOTORS CORP.

1. Remove the fill tube plug (1).

2. Remove the fill tube seal (2).

3. Install the fill tube seal (2) into the transmission case.

4. Align the tab on the fill plug (1) with the tang on the transmission case.

5. Install the fill plug (1) into the fill tube seal (2).

IMPORTANT: The fill plug retaining tab snaps into place over a tang on the

transmission case.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado

6. Press the fill plug down until the retaining tab locks into place.

Transmission Case Locating Pin Replacement

Fig. 324: View Of Transmission Case Locating Pin
Courtesy of GENERAL MOTORS CORP.

NOTE:

DO NOT mar the transmission case surface when removing the
locating pin. An unmarred surface is required to maintain the
seal between the low and reverse clutch housing assembly and
the transmission case.

IMPORTANT: Do not replace the transmission case locating pin unless the

locating pin is damaged.

2008 Chevrolet Silverado 1500

2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra &

Silverado