GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Optra - Mexico 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - Aisin (81-40LE) 🢒 Oil Pump Inspection

    Object Number: 1246009 Size: SH

    Important: If the body clearance is greater than the maximum, replace the oil pump body sub-assembly.

  1. Push the driven gear to one side of the body. Using a feeler gage, measure the clearance.

    2. Specifications

        • The standard body clearance is 0.1-0.17 mm (0.0039-0.0067 in).
        • The maximum body clearance is 0.17 mm (0.0067 in).

    Object Number: 1246013 Size: SH

    Important: If the tip clearance is greater than the maximum, replace the oil pump body sub-assembly.

  2. Measure the tip clearance between the driven gear teeth and drive gear teeth.

    3. Specifications

        • The standard tip clearance is 0.07-0.15 mm (0.0028-0.0059 in).
        • The maximum tip clearance is 0.15 mm (0.0059 in).

    Object Number: 1246014 Size: SH

    Important: If the side clearance is greater than the maximum, replace the drive gear, driven gear, or pump body.

  3. Using a steel straight edge and feeler gage, measure the side clearance of both gears.

    4. Specifications

        • The standard side clearance is 0.02-0.05 mm (0.0008-0.002 in).
        • The maximum side clearance is 0.05 mm (0.002 in).

    Object Number: 1246016 Size: SH

    Important: If the inside diameter is greater than the maximum, replace the oil pump body sub-assembly.

  4. Using a dial indicator, measure the inside diameter of the oil pump body bushing.

    5. Specifications

        • The standard inside diameter is 38.126 mm (1.50102 in).
        • The maximum inside diameter is 38.188 mm (1.50346 in).

    Object Number: 1246015 Size: SH

    Important: If the inside diameter is greater than the maximum, replace the stator shaft.

  5. Using a dial indicator, measure the inside diameter of the stator shaft bushings.

    6. Specifications

        • The standard inside diameter is 18.437 mm (0.72586 in).
        • The maximum inside diameter is 18.5 mm (0.728 in).