Transmission Fluid Pump Assemble

Special Tools 

J 21368:  Pump Body Cover Alignment Band

For equivalent regional tools, refer to Special Tools .

Fig 1: Inspecting Oil Pump Bushing
Courtesy of GENERAL MOTORS CORP.
1. Inspect the bushing (215) for wear - not serviceable.
Fig 2: View Of Oil Pump Components
Courtesy of GENERAL MOTORS CORP.
2. Inspect the oil pump parts for the following:
   • Worn, scored or gouged pump slide
   • Cracks, wear or damage to the rotor or vanes
   • Cuts or damage to the seals
   • Broken priming springs
Fig 3: Identifying Oil Pump Housing Inspection Areas
Courtesy of GENERAL MOTORS CORP.
3. Inspect the oil pump housing for the following:
   • Porosity
   • Interconnected oil passages
   • Damaged machined surfaces
Fig 4: Identifying Oil Pump Valves
Courtesy of GENERAL MOTORS CORP.
4. Inspect the valves (207, 210, 235) and springs (208, 209, 234, 238, 219) for the following:
   • Nicks or burrs on the valves
   • Worn, distorted or cracked springs
Fig 5: Identifying TCC Control Valve, Retainer & Spring
Courtesy of GENERAL MOTORS CORP.
5. Install the TCC control valve (235) and the TCC control valve spring (234).
6. Install the TCC control valve spring retainer (204).
Fig 6: Identifying Pressure Relief Ball, Pin & Spring
Courtesy of GENERAL MOTORS CORP.
7. Install the pressure relief valve (239) and spring (238).
8. Install the pressure valve spring retainer (211).
Fig 7: Identifying Pump Cover Screen Components
Courtesy of GENERAL MOTORS CORP.
9. Install the pump cover seal (212) onto the new pump cover screen (213).
10. Install the pump cover screen (213).
11. Install the pump cover screen pin (211).
Fig 8: Identifying Pressure Regulator Valve Components
Courtesy of GENERAL MOTORS CORP.
12. Install the pressure regulator valve (210), the pressure regulator valve spring (209), and the line boost valve spring (208).
13. Install the line boost valve bushing seal (205) onto the bushing (206).
14. Install the line boost valve (207) and the bushing (206).
15. Install the line boost valve bushing retainer (204).
Fig 9: Locating Reverse Clutch Housing Fluid Seal Rings
Courtesy of GENERAL MOTORS CORP.
16. Install the reverse clutch housing fluid seal rings (200).
Fig 10: Measuring Gage Bar To Pump Body Gap
Courtesy of GENERAL MOTORS CORP.
17. Measure the distance from the bottom of the gage bar to the pump body. Refer to Transmission Fluid Pump Specifications .
18. Measure the thickness of pump slide.
19. Select the proper size, refer to Transmission Fluid Pump Specifications .
20. Measure the thickness of the pump rotor.
21. Select the proper size rotor refer to Transmission Fluid Pump Specifications .
Fig 11: Identifying Fluid Pump Components
Courtesy of GENERAL MOTORS CORP.
22. Install the fluid pump support (217), the slide seal (218) and the fluid pump slide rings (220), and the fluid pump slide o-ring seal (242) onto the pump slide (216).
23. Install the slide pin (231).
NOTE: The fluid pump slide (216) is selective.
24. Install the pump slide (216).
25. Using a screwdriver install the slide spring (219).
Fig 12: Identifying Fluid Pump Vanes, Rings, Rotors & Guide
Courtesy of GENERAL MOTORS CORP.
26. Install the fluid pump vane ring (225).
27. Install the pump rotor guide (224).
NOTE: The fluid pump rotor (223) is selective.
28. Install the pump rotor (223).
29. Install the pump vanes (222).
30. Install the pump vane ring (221).
Fig 13: Identifying Oil Pump Cover
Courtesy of GENERAL MOTORS CORP.
31. Install the pump cover housing (202) onto the converter housing.
Fig 14: View Of Alignment Band
Courtesy of GENERAL MOTORS CORP.
32. Install J 21368:  alignment band and tighten.
Fig 15: Identifying Oil Pump Housing Bolts
Courtesy of GENERAL MOTORS CORP.
CAUTION: Refer to Fastener Caution .
33. Install the oil pump housing bolts (240, 241).
    • Tighten the fluid pump housing bolts (240) to 11 N.m (8 lb ft) .
    • Tighten the fluid pump housing bolts (241) to 22 N.m (16 lb ft) .
34. Remove J 21368:  alignment band.