Oil Pump

A760F AUTOMATIC TRANSMISSION: OIL PUMP: INSPECTION

1. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY





(a) Using a dial indicator, measure the inside diameter of the oil pump body bush.

Maximum inside diameter:

38.188 mm (1.50 in.)

* If the inside diameter is more than the maximum, replace the oil pump body sub-assembly.

2. INSPECT STATOR SHAFT ASSEMBLY

(a) Using a dial indicator, measure the inside diameter of the stator shaft bush.





Maximum inside diameter:

Front side
21.577 mm (0.849 in.)

Rear side
32.08 mm (1.26 in.)

* If the inside diameter is more than the maximum, replace the stator shaft assembly.

3. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

(a) Push the driven gear to one side of the body.





(b) Using a feeler gauge, measure the body clearance.

Standard body clearance:

0.10 to 0.17 mm (0.00394 to 0.00669 in.)

Maximum body clearance:

0.17 mm (0.00669 in.)

* If the body clearance exceeds the maximum, replace the drive gear, driven gear or pump body assembly. Replace the part or parts determined to be the most likely cause of the problem.

(c) Using a feeler gauge, measure the tip clearance between the driven gear teeth and drive gear teeth.





Standard tip clearance:

0.070 to 0.150 mm (0.00276 to 0.00591 in.)

Maximum tip clearance:

0.150 mm (0.00591 in.)

* If the tip clearance exceeds the maximum, replace the drive gear, driven gear or pump body assembly. Replace the part or parts determined to be the most likely cause of the problem.

(d) Using a steel straightedge and feeler gauge, measure the side clearance of both gears.





Standard side clearance:

0.02 to 0.05 mm (0.000787 to 0.00197 in.)

Maximum side clearance:

0.05 mm (0.00197 in.)

(e) If the side clearance exceeds the maximum, replace the drive gear, driven gear or pump body assembly. Replace the part or parts determined to be the most likely cause of the problem.

HINT
There are 5 different thicknesses for the drive and driven gears.

Drive and Driven Gear Thickness:





4. INSPECT FRONT OIL PUMP DRIVE GEAR ROTATION





(a) Place the oil pump body on the torque converter clutch.

(b) Check that the drive gear rotates smoothly.

(c) Remove the oil pump assembly from the torque converter.