Pump Assembly

Special Tool(s)









Disassembly





1. Remove and discard the seven pump support seal rings from the pump support.





2. Remove the six pump support bolts.





3. Separate the pump support and body assembly.
1. Remove the pump support.
2. Remove the pump body separator plate gasket.
3. Remove the pump body separator plate.
4. Remove the pump body.





4. Remove and discard the pump seal.





5. Remove the pump drive gear assembly.
1. Pump drive gear insert.
2. Pump drive gear.
3. Pump driven gear.
6. Clean all parts thoroughly in c lean solvent and blow dry with moisture-free regulated compressed air.
7. Inspect the pump body and gears for damage and wear.
^ Driven gear teeth
^ Drive gear teeth
^ Gear bore
^ Crescent
^ Lubrication passages and holes





8. Inspect the pump support apply circuit passages and lubrication passages.
1. Rear lube (from cooler TC circuit)
2. Reverse Clutch (RC)
3. Direct Clutch (DC)
4. Forward Clutch (FC)
5. Coast Clutch (CC)
6. Converter Clutch Bypass (CBY)

Assembly

1. NOTE: The identification dot on the pump driven gear must be facing downward.





Install the pump driven gear.





2. Install the pump drive gear assembly.
1. Install the pump drive gear.
2. Install the pump drive gear insert.





3. Using the special tool, measure the clearance between each gear and the pump body face.
^ If the clearance exceeds specification, install a new pump assembly.





4. Install the special tool.





5. Align the pump support assembly.
^ Fill the pump gear cavity with MERCON(R) Multi-purpose automatic transmission fluid or equivalent meeting MERCON(R) specification to the top of the gears. MERCON(R) automatic Transmission Fluid is being replaced by MERCON(R) V as a service fluid, as per TSB 06-14-4.
^ Align the pump guide screws.
1. Install the pump body.
2. Install the pump body separator plate.
3. Install the pump body separator plate gasket onto the pump body.
4. Install the pump support.

6. NOTE: Install the four pump support bolts in the pump support holes, and remove the special tool. Then install the last two bolts.





Install the six pump support bolts.

7. NOTE: Make sure that the white stripe on the pump seal is visible around the pump body circumferences





Install the pump seal on the pump body.

8. NOTE: Make sure the pump support seal rings are overlapped correctly.





Install the seven pump support seal rings.





9. Measure the pump rotational torque.
1. Install the pump drive shaft.
2. Measure the pump rotational torque.
3. Remove the pump drive shaft.
^ If rotational torque exceeds the specification, disassemble and inspect the pump assembly for contamination or incorrect end clearance.





10. Install the No. 1 pump support thrust bearing.
^ Lubricate the seal rings with MERCON(R) Multi-purpose automatic transmission fluid or equivalent meeting MERCON(R) specification.
11. Install the forward/coast/direct clutch cylinder and reverse clutch drum on the pump support.

12. NOTE: With each application of air, you should hear the apply of a clutch pack. A hissing or high pitched squeal indicates that a seal is damaged or torn. Inspect to find the source and repair as necessary.





Check the following passages of the forward/coast/direct clutch cylinder and reverse clutch drum with moisture-free compressed air, regulated to 276 kPa (40 psi).
1. Reverse clutch passage
2. Forward clutch passage
3. Direct clutch passage
4. Coast clutch passage