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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L80-E/4L85-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Off-Vehicle Repair Instructions >> Control Valve Body Cleaning and Inspection

Control Valve Body Cleaning and Inspection

    Fig 1: Control Valve Body
    GM40623Courtesy of GENERAL MOTORS CORP.
    NOTE: Do not reuse cleaning solvents. Previously used solvents may deposit sediment which may damage the component.
  1. Clean the control valve body (301) in clean solvent.
  2. Dry the control valve body (301) using compressed air.
  3. Inspect the control valve body casting for the following conditions:
    • Porosity
    • Cracks
    • Interconnected passages
    • Damaged machined surfaces