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Home › Cadillac › 2003 › DeVille Base › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transaxle - 4T80-E › Repair Instructions › Final Drive Assembly Replacement › Installation Procedure

Installation Procedure

  1. Install the sun gear (121) with the bushing and the seal side facing differential.
  2. Install the final drive carrier (100). Turn the unit until it meshes with the sun gear and the internal gear teeth.
    Fig 1: Installing Final Drive Carrier (100)
    G02099038Courtesy of GENERAL MOTORS CORP.
  3. Install the left thrush washer (117).
  4. Install the left differential side gear (118).
  5. Install the snap ring (56).
    Fig 2: Installing Snap Ring, Left Thrush Washer & Left Differential Side Gear
    G02099039Courtesy of GENERAL MOTORS CORP.
  6. Use the manual shaft to place the transaxle in park.

    This will lock up the final drive unit. The actuator rod will move up.

    NOTE: Refer to FASTENER NOTICE
  7. Install the differential housing and the four bolts (119). Hand tighten, using a star pattern.

    Tighten 

    Tighten the bolts to 76 N.m (56 lb ft).

  8. Install the case extension. Refer to CASE EXTENSION REPLACEMENT  .
    Fig 3: Installing Differential Housing & Four Bolts (119)
    G02099040Courtesy of GENERAL MOTORS CORP.
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