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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 817 (Automatic Transmission - 4L80-E/4L85-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Control Valve Body Assembly Removal

Control Valve Body Assembly Removal

WARNING: This page is about a different car, the 2007 GMC Yukon XL and 2007 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of TFP Manual Valve Position Switch & Bolts
    GM54538Courtesy of GENERAL MOTORS CORP.
  1. Remove the transmission fluid pressure manual valve position switch (TFP manual valve position switch) bolts (76) and the TFP manual valve position switch (40).
    2. Fig 2: View Of Control Valve Assembly
    GM54542Courtesy of GENERAL MOTORS CORP.
  2. Remove the control valve body assembly bolts (35).
  3. Remove the manual shift shaft detent spring assembly (41).
  4. Remove the control valve body assembly bolt (35) and the lube oil pipe retainer (37).
  5. Remove the lube oil pipe (39).
  6. Remove the control valve assembly (44) including the following:
    • The 3rd and 4th clutch accumulator housing (51)
    • The control valve body gasket (45) (not shown)
    • The control valve body spacer plate (46) (not shown)
    • The accumulator housing gasket (47) (not shown)
    7. Fig 3: Locating Manual Valve
    GM1300594Courtesy of GENERAL MOTORS CORP.
  7. Remove the manual valve (319) from the control valve assembly to prevent damage.
  8. Inspect the manual valve (319) for nicks and burrs.
    9. Fig 4: View Of Control Valve Body Spacer Plate Gasket & TCC Solenoid Valve Screen Assembly
    GM28385Courtesy of GENERAL MOTORS CORP.
  9. Remove the control valve body spacer plate gasket (48) from the case. The gasket may stick to the spacer plate.
    10. IMPORTANT: The TCC solenoid valve screen assembly can be removed easily by applying light pressure at the bottom of the screen.
  10. Remove the TCC solenoid valve screen assembly (75) from the case passages.
  11. Inspect the TCC solenoid valve screen assembly (75) for debris and damage.
    12. Fig 5: View Of Control Valve Body Ball Check Valves
    GM828381Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not use a magnet in order to remove the control valve body ball check valves. This may magnetize the control valve body ball check valves, causing metal particles to stick to them.
  12. Remove the 8 control valve body ball check valves (54).
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