Disassembly and inspection
1. Remove the O-rings from the oil pump housing.
2. Remove the five bolts and remove the shaft support from the housing.
3. Remove the oil pump housing from the torque converter.
4. After marking the oil pump drive and driven gears for reassembly, remove them.
5. Remove the steel ball from the housing.
6. Remove the circlip and oil seal from the oil pump drive gear.
7. Measure the end clearance of the oil pump gears. If it is greater than normal, or if inspection of the surface of the oil pump housing in contact with the pump gears shows damage, replace the oil pump. Normal value: 0.02-0.48mm
8. Inspect the shaft bearing surface that contacts the oil pump gears. Replace oil pump if damaged.
9. Check the rotation of the oil pump drive gear.
Assembly
1. Assembly is carried out in the reverse order of disassembly.