Oil Pump

AA80F AUTOMATIC TRANSMISSION: 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 distance:

6.52 mm (0.257 in.)

Text in Illustration





2. INSPECT FRONT OIL PUMP BODY SUB-ASSEMBLY





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

Maximum inside diameter:

45.078 mm (1.77 in.)

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

4. INSPECT CLEARANCE OF OIL PUMP ASSEMBLY





(a) Push the front oil pump driven gear to one side of the front oil pump body sub-assembly.

(b) Using a feeler gauge, measure the clearance between the front oil pump driven gear and front oil pump body sub-assembly.

Standard body clearance:

0.10 to 0.17 mm (0.00394 to 0.00669 in.)

If the body clearance is not as specified, replace the front oil pump drive gear, front oil pump driven gear and front oil pump body sub-assembly.

(c) Using a feeler gauge, measure the clearance between the front oil pump driven gear teeth and front oil pump 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 front oil pump drive gear, front oil pump driven gear and front oil pump body sub-assembly.

(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 front oil pump drive gear, front oil pump driven gear and front oil pump body sub-assembly.

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

Standard drive and driven gears thickness:





5. INSPECT OIL PUMP DRIVE GEAR ROTATION





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

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