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Home >> Pontiac >> 2007 >> Vibe Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission Mu4 - Overhaul >> Off-Vehicle Repair Instructions >> Countershaft Assembly Replacement >> Installation Procedure

Installation Procedure

    Fig 1: Installing Countershaft Inner Drive Pinion Bearing Race With J 8092 & J 35287
    GM165133Courtesy of GENERAL MOTORS CORP.
  1. Use the J 35287  with a J 8092  and a hammer to install the countershaft inner drive pinion bearing race into the countershaft drive pinion (1).
    2. Fig 2: Identifying J 35287 & J 8092
    GM165143Courtesy of GENERAL MOTORS CORP.
  2. Use the J 35287  with a J 8092  and a hammer to install the countershaft outer drive pinion bearing race into the countershaft drive pinion (2).
    3. IMPORTANT: In order to achieve true and accurate countershaft drive pinion bearing preload, the countershaft drive pinion must be rotated during the installation of the countershaft drive pinion bearing (3) to ensure that the new crush sleeve is not collapsed before countershaft drive pinion preload can be adjusted. It is recommended that the countershaft drive pinion and outer drive pinion bearing be installed first and then the countershaft front roller bearing inner race. This is to allow the technician to rotate the countershaft drive pinion during outer drive pinion bearing installation. If the countershaft drive pinion will not rotate, or is hard to rotate after outer drive pinion bearing installation, the crush sleeve has been collapsed and must be replaced with a new crush sleeve.
    Fig 3: View Of Countershaft Inner Drive Pinion Bearing
    GM165138Courtesy of GENERAL MOTORS CORP.
  3. Use the J 37278  and a hydraulic press to install the countershaft inner drive pinion bearing (3) onto the countershaft (2). See Special Tools .
  4. Install the underdrive planetary ring gear onto the underdrive planetary ring gear flange on the countershaft, securing with the underdrive planetary ring gear snap ring.
  5. Install the new crush sleeve onto the countershaft.
    6. Fig 4: Countershaft Drive Pinion & Outer Drive Pinion Bearing
    GM165145Courtesy of GENERAL MOTORS CORP.
  6. Use the J 37278  and a hydraulic press to install the countershaft drive pinion and outer drive pinion bearing onto the countershaft (1) while rotating the countershaft drive pinion (2). See Special Tools .
    7. Fig 5: View Of J 37278
    GM165149Courtesy of GENERAL MOTORS CORP.
  7. Use the J 37278  and a hydraulic press to install the countershaft outer drive pinion bearing (2) onto the countershaft while rotating the countershaft drive pinion. See Special Tools .
    8. Fig 6: Pressing Countershaft Front Roller Bearing Inner Race Onto Countershaft
    GM165150Courtesy of GENERAL MOTORS CORP.
  8. Use the J 37278  and a hydraulic press to press the countershaft front roller bearing inner race onto the countershaft (1); leaving a small space between the countershaft front roller bearing inner race and the outer drive pinion bearing. See Special Tools .
    9. Fig 7: Locating Underdrive Sun Gear Outer Thrust Bearing & Race
    GM165152Courtesy of GENERAL MOTORS CORP.
  9. Install the underdrive sun gear outer thrust bearing (1) and race (3) onto the countershaft.
    10. Fig 8: Identifying Underdrive Planetary Carrier
    GM165154Courtesy of GENERAL MOTORS CORP.
  10. Install the underdrive planetary carrier (1) into the countershaft drive pinion.
  11. Install the underdrive planetary carrier snap ring into the countershaft drive pinion (2).
    12. Fig 9: Front Countershaft Locknut & Countershaft
    GM165155Courtesy of GENERAL MOTORS CORP.
  12. Install the front countershaft locknut (1) onto the countershaft. Do not tighten fully.
    13. Fig 10: Adjusting Countershaft Drive Pinion Bearing Using J 37271
    GM165157Courtesy of GENERAL MOTORS CORP.
  13. Use a J 37271  and a torque wrench to adjust the countershaft drive pinion bearing preload (countershaft starting torque). See Special Tools .
    • Temporarily install the countershaft driven gear (3) onto the countershaft using a hydraulic press.
    • Use a J 34826  to temporarily install the countershaft driven gear locknut onto the countershaft. See Special Tools .
    • Place the countershaft assembly in a soft jaw vise, holding the countershaft assembly by the countershaft driven gear locknut.
    14. Fig 11: Tightening Front Countershaft Locknut With J 37271
    GM165159Courtesy of GENERAL MOTORS CORP.
  14. Use a J 37271  to tighten the front countershaft locknut gradually in increments of 5 N. See Special Tools .m (44 lb in).
  15. Between each tightening increment, remove the countershaft assembly from the soft vise and place the countershaft drive pinion in the soft jaw vise so that the countershaft (1) is able to rotate.
    16. Fig 12: View Of J 37271
    GM165163Courtesy of GENERAL MOTORS CORP.
  16. Use the J 37271  and a torque wrench to measure the countershaft drive pinion bearing preload (countershaft starting torque) between each increment of tightening. See Special Tools .

    The countershaft should require the following approximate specifications to rotate:

    • For new bearings: 0.6-1.0 N.m (5.30-8.80 lb in)
    • For reused bearings: 0.3-0.5 N.m (2.60-4.3 lb in)

      If the countershaft drive pinion bearing preload does not fall within specification, inspect the countershaft assembly components for excessive wear.

  17. Remove the countershaft drive pinion from the soft jaw vise.
  18. Use a J 34826  to remove the countershaft driven gear locknut. See Special Tools .
    19. Fig 13: Identifying J 37273
    GM165166Courtesy of GENERAL MOTORS CORP.
  19. Use a J 37273  and a hydraulic press (1) in order to remove the countershaft driven gear (2) from the countershaft (3). See Special Tools .
    20. Fig 14: Unstaking & Staking Front Countershaft Locknut
    GM165168Courtesy of GENERAL MOTORS CORP.
  20. Stake the front countershaft locknut (1).
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