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ATF Pump Inspection

  1. Install the ATF pump drive gear (A), the driven gear (B), and the ATF pump driven gear shaft (C) in the main valve body (D). Lubricate all parts with ATF, and install the ATF pump driven gear with its grooved and chamfered side facing up.

  1. Measure the side clearance of the ATF pump drive gear (A) and the driven gear (B).

    ATF Pump Gears Side (Radial) Clearance

    Standard (New)
    ATF Pump Drive Gear:
    0.210−0.265 mm (0.0083−0.0104 in.)
    ATF Pump Driven Gear:
    0.070−0.125 mm (0.0028−0.0049 in.)


  1. Remove the ATF pump driven gear shaft. Measure the thrust clearance between the ATF pump driven gear (A) and the valve body (B) with a straight edge (C) and a feeler gauge (D).

    ATF Pump Drive/Driven Gear Thrust (Axial) Clearance

    Standard (New):
    0.03−0.06 mm (0.001−0.002 in.)
    Service Limit:
    0.07 mm (0.003 in.)