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Home >> Chevrolet >> 2002 >> C3500 HD 8.1 G, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1580 (Automatic Transmission - 4T45-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> On-Vehicle Repair Instructions >> Low/Reverse Servo Assembly Replacement >> Disassembly Procedure

Disassembly Procedure

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Exploded View Of Servo Assembly
    GM1803404Courtesy of GENERAL MOTORS CORP.
  1. Remove the piston pin assembly (67-70) from the servo cover (73).
  2. Remove the snap ring (70) from the servo pin (67).
  3. Remove the piston (69) and the servo cushion spring (68), or springs (139), from the servo pin (67).
  4. Remove the servo piston seals (71, 72) from the cover (73).
  5. Discard the servo piston seals (71 and 72).
  6. Inspect all the components for damage.
  7. Inspect the fluid feed holes for the proper opening.
  8. Inspect the bolt hole threads for debris or stripping.
  9. Inspect the seal grooves for damage.
  10. Clean and dry each component.
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