Oil Pump

A750E 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 bushing.

Maximum inside diameter:

38.188 mm (1.504 in.)

* If the inside diameter is greater than the maximum, replace the oil pump body.

2. INSPECT STATOR SHAFT ASSEMBLY





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

Maximum inside diameter:

Front side
21.577 mm (0.850 in.)

Rear side
32.08 mm (1.263 in.)

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

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 clearance.

Standard body clearance:

0.10 to 0.17 mm (0.0039 to 0.0067 in.)

Maximum body clearance:

0.17 mm (0.0067 in.)

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





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

Standard tip clearance:

0.07 to 0.15 mm (0.0028 to 0.0059 in.)

Maximum tip clearance:

0.15 mm (0.0059 in.)

* If the tip clearance is greater than the maximum, replace drive gear, the driven gear or pump body.





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

Standard side clearance:

0.02 to 0.05 mm (0.0008 to 0.0020 in.)

Maximum side clearance:

0.05 mm (0.0020 in.)

(e) There are 5 different thicknesses for the drive and driven gears.

Drive and drive gears thickness:





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

4. INSPECT FRONT OIL PUMP DRIVE GEAR ROTATION





(a) Make sure the drive gear rotates smoothly.

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