Oil Pump

AA80E AUTOMATIC TRANSMISSION / TRANSAXLE: OIL PUMP: INSPECTION

1. INSPECT STATOR SHAFT SPRING SUB-ASSEMBLY

(a) Using a vernier caliper and straightedge, measure the distance between the spring end and the straightedge.





Standard thickness:

6.52 mm (0.257 in.)

2. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the oil pump body bush.





Maximum inside diameter:

45.078 mm (1.77 in.)

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

3. INSPECT STATOR SHAFT ASSEMBLY

(a) Using a caliper gauge, measure the inside diameter of the stator shaft bush.





Maximum inside diameter:

Front side
25.925 mm (1.02 in.)

Rear side
35.251 mm (1.39 in.)

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

4. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY

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





(b) Using a feeler gauge, measure the clearance between the driven gear and pump body.

Standard body clearance:

0.10 to 0.17 mm (0.00394 to 0.00669 in.)

If the clearance is not as specified, replace the drive gear, driven gear and 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 (0.00276 to 0.00591 in.)

If the tip clearance is not as specified, replace the drive gear, driven gear and pump body.

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





Standard side clearance:

0.03 to 0.05 mm (0.00118 to 0.00197 in.)

If the side clearance is not as specified, replace the drive gear, driven gear and pump body.

HINT
There are 7 different thicknesses for the drive and driven gears.

Standard Drive and Driven Gear Thickness:





5. INSPECT OIL PUMP DRIVE GEAR ROTATION

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





(b) Make sure that the drive gear rotates smoothly.