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Home >> Buick >> 2005 >> LeSabre Custom, 4T65E/MN3 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - Introduction & Repair Instructions >> Repair Instructions >> Control Valve Body Replacement >> Installation Procedure
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Installation Procedure

    NOTE: The assembly of some components will require the use of an assembly lube. Always use J 36850 Transjel™ or petroleum jelly during assembly. Greases other than the recommended assembly lube will change the transmission fluid characteristics and cause undesirable shift conditions and/or filter clogging.
    Fig 1: Locating Spacer Plate & Gasket
    GM49396Courtesy of GENERAL MOTORS CORP.
  1. Inspect the control valve body spacer plate (370) for the following conditions:
    • Plugged holes
    • Damaged gasket sealing surfaces
    • Plugged or damaged screen/seal assemblies (382)
    2. Fig 2: Inspecting Valves For Excessive Peening
    GM12988Courtesy of GENERAL MOTORS CORP.
  2. Inspect each ball check valve seat one at a time on the spacer plate (370) for excessive peening.
    • Place a ball check valve (372) on each seat
    • Use a flashlight to look for visible light between the ball check valve and the seat.
    • If light is visible between the ball check valve and the seat, replace the spacer plate assembly (370).
    3. Fig 3: Locating Ball Check Valves In Case Cover
    GM48229Courtesy of GENERAL MOTORS CORP.
  3. Install four ball check valves (372) into the case cover (400), in the positions shown. Use J 36850  . See Special Tools .
    4. Fig 4: Locating Ball Check Valves In Valve Body
    GM49399Courtesy of GENERAL MOTORS CORP.
  4. Install the two larger ball check valves (373) and the four smaller ball check valves (372) into the control valve body (300). Use J 36850  . See Special Tools .
    5. Fig 5: Installing Spacer Screen/Seal Into Spacer Plate
    GM49398Courtesy of GENERAL MOTORS CORP.
  5. Install the screen/seal assemblies (382) into the spacer plate assembly (370).
  6. Install the control valve body to spacer plate gasket (371), the spacer plate assembly (370) and the case cover to spacer plate gasket (369) onto the control valve body (300).
  7. Install the bolts (368) to hold the spacer plate and gaskets onto the control valve body (300).
    8. Fig 6: Installing Control Valve Body Alignment Sleeve Into Case Cover
    GM49400Courtesy of GENERAL MOTORS CORP.
  8. Install the control valve body alignment sleeve (410) into the case cover (400).
    9. IMPORTANT:
    • Use the control valve body alignment sleeve (410) and turbine shaft sleeve in the case cover (400) as guides.
    • Be sure that the ball check valves do not drop out of the control valve body (300) during assembly.
  9. Install the control valve body (300) onto the case cover (400).
    10. Fig 7: Transmission Fluid Pressure (TFP) Manual Valve
    GM840847Courtesy of GENERAL MOTORS CORP.
  10. Install the transmission fluid pressure (TFP) manual valve position switch assembly (395) onto the control valve body (300).
    11. IMPORTANT: Finger start the bolts to prevent cross-threading.
    Fig 8: Installing Valve Body Bolts
    GM840845Courtesy of GENERAL MOTORS CORP.
  11. Install the control valve body bolts (374-381, 384) as indicated.
    12. IMPORTANT:
    • Tighten the bolts in a spiral pattern starting with the bolts at the center of the control valve body.
    • If the bolts are tightened at random, valve bores may become distorted and inhibit proper valve operation.
  12. Tighten the control valve body bolts (374-381, 384) as indicated by the following list.

    Tighten: 

    • The 374 to 12 N.m (106 lb in)
    • The 375 to 12 N.m (106 lb in)
    • The 376 to 12 N.m (106 lb in)
    • The 377 to 12 N.m (106 lb in)
    • The 378 to 12 N.m (106 lb in)
    • The 379 to 16 N.m (11 lb ft)
    • The 380 to 25 N.m (18 lb ft)
    • The 381 to 8 N.m (70 lb in)
    • The 384 to 12 N.m (106 lb in)

  13. Install the oil pump. Refer to Oil Pump Replacement .
    14. Fig 9: Wiring Harness
    GM97350Courtesy of GENERAL MOTORS CORP.
  14. Install the wiring harness.
  15. Install the case side cover. Refer to Case Side Cover Replacement .
  16. Fill the transaxle to the proper level. Refer to Fluid Capacity Specifications .
  17. Inspect the transaxle fluid level. Refer to Transmission Fluid Checking Procedure .
  18. Inspect for fluid leaks.
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