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Home >> Chevrolet >> 2009 >> Corvette Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Manual Transmission - TREMEC 6-Speed) >> Repair Instructions - Off Vehicle >> Shimming Procedures >> Input Shaft, Mainshaft, and Countershaft

Input Shaft, Mainshaft, and Countershaft

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Countershaft, Mainshaft Assembly, Input Shaft & Adapter Plate
    GM1938464Courtesy of GENERAL MOTORS CORP.
  1. Rotate the transmission adapter plate to the vertical position.
  2. Install the following assemblies in order:
    1. The input shaft to the adapter plate
    2. Align the 4th speed gear blocking ring to the input shaft.
    3. The mainshaft assembly
      4. NOTE: Lift up the mainshaft enough to install the countershaft.
    4. The countershaft
    3. Fig 2: View Of Transmission Case
    GM1938466Courtesy of GENERAL MOTORS CORP.
  3. Install the transmission case.
    4. Fig 3: View Of Adapter Plate & Transmission Case Bolts
    GM1938467Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to Fastener Caution .
  4. Install the adapter plate to transmission case bolts and tighten to 36 N.m (27 Ib. ft).
    5. Fig 4: Input Shaft/Mainshaft End Play & Special Tool J 8001
    GM1938468Courtesy of GENERAL MOTORS CORP.
  5. Measure the input shaft/mainshaft end play using the following procedure:
    1. Place the tip of the J 8001:  indicator set -3 on the end of the mainshaft.
    2. Move the main shaft up and down.
    3. Record the measurement.
  6. Select a shim to achieve 0.0127-0.0889 mm (0.00049-0.00349 in) preload.
  7. Remove the J 8001:  indicator set -3.
    8. Fig 5: View Of Special Tool On End Of Countershaft
    GM1847550Courtesy of GENERAL MOTORS CORP.
  8. Measure the countershaft end play using the following procedure:
    1. Place the tip of the J 8001:  indicator set -3 on the end of the countershaft.
    2. Move the countershaft up and down.
    3. Record the measurement.
  9. Select a shim to achieve 0.0127-0.0889 mm (0.00049-0.00349 in) preload.
  10. Remove the J 8001:  indicator set -3.
    11. Fig 6: View Of Shift Lever Guide Bolts
    GM1938470Courtesy of GENERAL MOTORS CORP.
  11. Remove the shift lever guide bolts.
    12. Fig 7: View Of Adapter Plate & Transmission Case Bolts
    GM1938467Courtesy of GENERAL MOTORS CORP.
  12. Remove the adapter plate to the transmission case bolts.
    13. Fig 8: View Of Transmission Case
    GM1938466Courtesy of GENERAL MOTORS CORP.
  13. Remove the transmission case.
    14. Fig 9: View Of Countershaft, Mainshaft Assembly, Input Shaft & Adapter Plate
    GM1938464Courtesy of GENERAL MOTORS CORP.
  14. Remove the following parts in order:
      NOTE: Lift up the mainshaft enough to remove the countershaft.
    1. The countershaft
    2. The mainshaft assembly
    3. The input shaft from the adapter plate
    15. Fig 10: View Of Input Shaft Bearing Race
    GM1938473Courtesy of GENERAL MOTORS CORP.
  15. Remove the input shaft bearing race.
  16. Remove the input shaft bearing shim and discard.
  17. Install the new input shaft bearing shim, and the original bearing race.
    18. Fig 11: View Of Countershaft Bearing Race
    GM1938474Courtesy of GENERAL MOTORS CORP.
  18. Remove the countershaft bearing race.
  19. Remove the countershaft bearing shim and discard.
  20. Install the new input shaft bearing shim, and the original bearing race.
  21. Refer to Transmission Assemble .
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