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Home >> Cadillac >> 2007 >> Escalade ESV >> Repair and Diagnosis >> External Pages >> Different car >> Section 969 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Off-Vehicle Repair Instructions >> Control Valve Body Assemble >> Inspection Procedure

Inspection Procedure

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Inspecting Control Valve Body For Channel Witness Marks
    GM7628Courtesy of GENERAL MOTORS CORP.
  1. Inspect the valve body to spacer plate gasket for valve body channel witness marks. The witness marks should be complete. Incomplete witness marks may be caused by an uneven case surface. Incomplete witness marks may also be caused by cross-channel leaks.
  2. Inspect the valve body casting for the following conditions:
    • Porosity
    • Cracks
    • Damaged machined surfaces
    • Chips or debris
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