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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 48 (Automatic Transaxle - 4T80-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Case Inspection

Case Inspection

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Case Inspection Points
    GM11875Courtesy of GENERAL MOTORS CORP.
    NOTE: Use J 36850 or equivalent during assembly in order to retain checkballs or to lubricate components. Lubricants other than the recommended assembly lube changes the transmission fluid characteristics and causes undesirable shift conditions or filter clogging.
  1. Clean the case thoroughly with solvent. Air dry.
    • Do not wipe with a cloth or with paper shop towels.
    • Remove all residual sealant. Clean the case threads.
  2. Inspect the case channel plate side for the following:
    • Unmarred gasket sealing surfaces that need to be cleaned
    • Bolt holes with stripped threads
    • Porosity between oil passages
    • Cracks in the casting
    • Damaged snap ring grooves
    • Damaged band anchors
    • Leaking drain plugs
  3. Fig 2: Identifying Servo Bores Inspection Areas
    GM11876Courtesy of GENERAL MOTORS CORP.
  4. Inspect all servo bores for the following:
    • Scratches or scoring
    • Porosity