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Home >> Pontiac >> 2006 >> Vibe Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Automatic Transmission - Mu4 - Overhaul) >> Repair Instructions >> Countershaft Assembly Replacement >> Removal Procedure

Removal Procedure

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    Fig 1: Locating J 37271
    GM165086Courtesy of GENERAL MOTORS CORP.
  1. Use a J 37271  and a torque wrench to measure the countershaft drive pinion bearing preload (countershaft starting torque) before disassembly. See Special Tools .
    • Place the countershaft drive pinion (1) in a soft jaw vise and turn the countershaft front lock nut with a J 37271  and a torque wrench. See Special Tools .
    • The countershaft requires approximately 0.6-1.0 N.m (5.3-8.8 lb in) to rotate.
    • If the countershaft drive pinion bearing preload does not fall within specification, inspect the countershaft assembly components for excessive wear.
    2. Fig 2: Removing Underdrive Planetary Carrier Snap Ring
    GM165090Courtesy of GENERAL MOTORS CORP.
  2. Remove the underdrive planetary carrier snap ring (2) from the countershaft drive pinion (1).
    3. Fig 3: View Of Underdrive Planetary Carrier
    GM165092Courtesy of GENERAL MOTORS CORP.
  3. Remove the underdrive planetary carrier (2) from the countershaft drive pinion (1).
    4. Fig 4: Identifying Underdrive Sun Gear Outer Thrust Bearing & Race
    GM165095Courtesy of GENERAL MOTORS CORP.
  4. Remove the underdrive sun gear outer thrust bearing (1) and the race (3) from the countershaft (2).
    5. Fig 5: Locating Countershaft Front Roller Bearing Inner Race, Outer Drive Pinion & Bearing
    GM165099Courtesy of GENERAL MOTORS CORP.
  5. Use the J 37273  with a J 36513  and a hydraulic press (2) to remove the following components from the countershaft:
    • The countershaft front roller bearing inner race
    • The countershaft outer drive pinion bearing
    • The countershaft drive pinion
  6. Remove the crush sleeve from the countershaft.
    7. Fig 6: Removing Underdrive Planetary Ring Gear & Snap Ring
    GM165106Courtesy of GENERAL MOTORS CORP.
  7. Remove the following components from the underdrive planetary ring gear flange on the countershaft:
    • The underdrive planetary ring gear snap ring (1)
    • The underdrive planetary ring gear (2)
    8. Fig 7: Identifying J 37273 & J 22912-01
    GM165108Courtesy of GENERAL MOTORS CORP.
  8. Use the J 37273  with a J 22912-01  and a hydraulic press (2) to remove the countershaft inner drive pinion bearing (1) from the countershaft. See Special Tools .
    9. Fig 8: View Of Countershaft Inner Drive Pinion Bearing Race
    GM165112Courtesy of GENERAL MOTORS CORP.
  9. Use a standard drift punch and a hammer to remove the countershaft inner drive pinion bearing race (2) from the countershaft drive pinion.
    10. Fig 9: Removing Countershaft Outer Drive Pinion Bearing Race
    GM165123Courtesy of GENERAL MOTORS CORP.
  10. Use a standard drift punch and a hammer to remove the countershaft outer drive pinion bearing race (1) from the countershaft drive pinion (2).
  11. Clean all countershaft assembly components and dry thoroughly.
  12. Inspect all countershaft assembly bearings and races for rough operation, excessive wear or damage and replace as necessary.
  13. Inspect the countershaft drive pinion gear and parking gear for chipped or broken teeth, excessive wear or damage. Replace the countershaft drive pinion as necessary.
  14. Inspect the following components for excessive wear or damage and replace as necessary:
    • The underdrive planetary ring gear
    • The underdrive planetary carrier
    • The underdrive sun gear
    15. Fig 10: Illustrating Measuring Underdrive Sun Gear Flange Inside Diameter
    GM165127Courtesy of GENERAL MOTORS CORP.
  15. Use the J 26900-6  to measure the underdrive sun gear flange bushing inside diameter. See Special Tools .
    • The standard underdrive sun gear flange inside diameter should fall within 29.800 to 29.825 mm (1.1735 to 1.1742 in).
    • The maximum sun gear flange bushing inside diameter is 29.870 mm (1.1760 in).
    • If the underdrive sun gear flange bushing inside diameter is greater than specified, replace the underdrive sun gear (3).
    16. Fig 11: Measuring Underdrive Planetary Carrier Pinion Gear Thrust Clearance With Feeler Gage
    GM165130Courtesy of GENERAL MOTORS CORP.
  16. Use a feeler gage (2) to measure the underdrive planetary carrier pinion gear (1) thrust clearance.
    • Standard underdrive planetary carrier pinion gear thrust clearance should fall within 0.20 to 0.50 mm (0008 to 0.020 in).
    • If the underdrive planetary carrier pinion gear thrust clearance is greater than 0.50 mm (0.020 in), replace the underdrive planetary carrier.
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