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.
   Fig 1: Identifying ATF Pump Drive Gear, Driven Gear And ATF Pump Driven Gear Shaft

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
2. Measure 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.) 

   Fig 2: Measuring Side Clearance Of ATF Pump Drive Gear And Driven Gear

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
3. 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.) 

Fig 3: Measuring Thrust Clearance Between ATF Pump Driven Gear And Valve Body

Courtesy of AMERICAN HONDA MOTOR CO., INC.