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Fig. 204: Exploded View Of Oil Pump 1. Remove the wear plate (1). 2. Note the presence or absence of punch marks on the drive gear and driven gear. 3. If not punch-marked, mark the gears so as to be able to reinstall them in their original positions. 4. Remove the drive gear (2) and driven gear (3) from the oil pump body (4). 5. Remove the O-ring (6). OIL PUMP INSPECTION IMPORTANT: The oil pump drive gear and driven gear have a punch mark on one side. Before the gears are removed from the oil pump,
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 205: Measuring Depth Of Oil Pump Body Gear Cavity 1. Measure the depth of the oil pump body gear cavity at dimension A. Specification: The gear cavity maximum depth is 24.940 mm (0.9819 in). IMPORTANT: Make the following measurements described below at Replace the oil pump body, driven gear and drive gear if
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 206: Measuring Inside Diameter Of Oil Pump Body Gear Cavity 2. Measure the ID of the oil pump body gear cavity at dimension A. Specification: The gear cavity maximum ID is 109.191 mm (4.2989 in).
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 207: Measuring Outside Diameter Of Oil Pump Driver Gear 3. Measure the OD of the driven gear at dimension A. Specification: The driven gear minimum OD is 108.987 mm (4.2908 in).
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - Allison - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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