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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Automatic Transaxle - 4T65-E - Overhaul) >> Repair Instructions >> Transmission to Transfer Case End Play Check (F4WD Only) >> Checking Procedure

Checking Procedure

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    Fig 1: Identifying Final Drive Sun Gear Shaft
    GM630823Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Transmission oil circulates between the transmission assembly and the transfer case. In situations where transmission related failures circulate debris into the transfer case, the transfer case must be disassembled, cleaned and inspected for damage. Refer to Internal Components Cleaning and Inspection .
  1. Position the transaxle so that the case side cover is facing down.
  2. Install the final drive sun gear shaft (689).
    3. Fig 2: View Of Park Gear Thrust Bearing & Park Gear
    GM630822Courtesy of GENERAL MOTORS CORP.
    NOTE: The park gear thrust bearing (695) must be retained in the park gear (696) when installing the transfer case to the transmission or damage may occur.
  3. Use J 36850  or equivalent in order to retain the parking gear thrust bearing (695) to the parking gear (696).

    Install the parking gear thrust bearing (695) and the parking gear (696).

    4. Fig 3: Identifying Final Drive Sun Gear
    GM677375Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The counterbore on the final drive sun gear installs towards the parking gear.
  4. Install the final drive sun gear (697).
    5. Fig 4: Installing J 44472 Onto Transmission Case
    GM630824Courtesy of GENERAL MOTORS CORP.
  5. Install the gauge bar (1) onto the case mounting surface.
    6. NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
    IMPORTANT: Install bolts to J 44472  and tighten securely to prevent tool deflection during end play measurement. See Special Tools .
  6. Install J 44472  (2) onto the transmission. See Special Tools .

    Tighten:  Tighten J 44472  to remove end play. See Special Tools . Hand tighten only.

    7. Fig 5: Measuring Dimension A
    GM630825Courtesy of GENERAL MOTORS CORP.
  7. Measure the distance from the case mounting surface, bottom of the gauge bar (1) to the top of the final drive sun gear (697). This measurement is dimension A, refer to Transfer Case Selective Washer Specifications .
  8. Remove the gauge bar (1) and J 44472  (2). See Special Tools .
    9. Fig 6: Identifying Dimension B1
    GM630826Courtesy of GENERAL MOTORS CORP.
  9. Install the gauge bar onto the carrier.
  10. Measure the distance from the bottom of the gauge bar to the transfer case. This measurement is Dimension B1.
    11. Fig 7: Measuring Dimension B2
    GM630827Courtesy of GENERAL MOTORS CORP.
  11. Measure the distance from the bottom of the gauge bar to the thrust bearing (1). This measurement is Dimension B2.
  12. Subtract Dimension B2 from Dimension B1. This Dimension is B. Refer to Transfer Case Selective Washer Specifications .
  13. Remove the gauge bar from the transfer case.
    14. Fig 8: Locating Final Drive Sun Gear
    GM630819Courtesy of GENERAL MOTORS CORP.
  14. Remove the final drive sun gear (697).
    15. Fig 9: View Of Selective Washer
    GM630820Courtesy of GENERAL MOTORS CORP.
  15. Refer to Transfer Case Selective Washer Specifications .

    Install the selective washer (902).

    16. Fig 10: Identifying Final Drive Sun Gear
    GM677375Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The counterbore on the final drive sun gear installs towards the parking gear.
  16. Install the final drive sun gear (697).
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