Chevrolet Silverado / GMC Sierra. Manual — part 901

Fig. 208: Measuring Distance Between Flats Of Drive Gear
Courtesy of GENERAL MOTORS CORP.

4. Measure the distance between the flats of the drive gear at dimension A.

Specification: The maximum distance between the flats is 52.165 mm (2.0537 in).

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 209: Drive Gear & Driven Gears
Courtesy of GENERAL MOTORS CORP.

5. Align the drive gear (1) and driven gear (2) with the oil pump so that their punch marks are

in the same position as when they were originally removed.

6. Install the gears into the oil pump body (3).

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 210: Measuring Driven Gear To Oil Pump Body Clearance
Courtesy of GENERAL MOTORS CORP.

7. Measure the clearance between the driven gear (1) and the oil pump body (2), driven gear

diametrical clearance.

Specification: The driven gear maximum diametrical clearance is 0.20 mm (0.0080 in).

2008 Chevrolet Silverado 1500

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

Silverado

Fig. 211: Measuring Driven Gear To Oil Pump Body Crescent Clearance
Courtesy of GENERAL MOTORS CORP.

8. Measure the clearance between the driven gear (1) and the oil pump body crescent (2).

Specification: The driven gear/crescent maximum clearance is 0.455 mm (0.0179 in).

2008 Chevrolet Silverado 1500

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

Silverado

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