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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 >> On-Vehicle Repair Instructions >> Pressure Regulator Replacement >> Removal Procedure

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the transmission oil pan and the filter. Refer to Automatic Transmission Fluid and Filter Replacement .
    3. Fig 1: View Of Valve Bore Plug Retainer Ring & Reverse Boost Valve Bushing Retainer Ring
    GM102558Courtesy of GENERAL MOTORS CORP.
    CAUTION: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.
  3. Remove the reverse boost valve bushing retainer ring (2).
    4. Fig 2: Reverse Boost Valve Assembly
    GM43318Courtesy of GENERAL MOTORS CORP.
  4. Remove the following from the reverse boost valve cylinder:
    • The reverse boost valve bushing
    • The reverse boost valve
    • The pressure regulator spring retainer
    • The pressure regulator spring
    • The pressure regulator valve
    • The reverse boost valve bushing
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