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Home >> Oldsmobile >> 2003 >> Aurora >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle - 4T80-E >> Repair Instructions >> Final Drive Assembly Replacement >> Installation Procedure
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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.
    3. Fig 1: Installing Final Drive Assembly
    G01506592Courtesy 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).
    6. Fig 2: Installing Left Side Differential Gear
    G01506593Courtesy 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 in GM Vehicles Cautions and Notices.
  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  .
    9. Fig 3: Installing Differential Housing
    G01506594Courtesy of GENERAL MOTORS CORP.
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