GM Service Manual Online
For 1990-2009 cars only

Tools Required

87 91 311 Bearing Driver Shaft Sleeve


    Object Number: 895162  Size: SH
  1. Put the reverse idler gear shaft in the 87 91 311 . Ensure that the rim of the 87 91 311 rests on the reverse gear and not on the idler shaft washer.
  2. Important: When tapping out the reverse idler rear shaft, make sure the shaft washer does not separate from the shaft.

  3. Carefully tap the reverse idler gear shaft out of the shaft support bracket using a punch in the center of the shaft.

  4. Object Number: 895163  Size: SH
  5. Remove the shaft support bracket and discard.
  6. Remove the reverse idler gear washer, reverse gear, reverse synchronizer sleeve, reverse gear blocking ring with spring, reverse idler gear, and reverse gear bearing.
  7. Inspect the condition of the gears and synchronizer. Refer to Gear Synchronizer Blocker Ring Inspection .
  8. Measure the clearance between the blocking ring and reverse the idler gear in 4 places.
  9. Specification
    The minimum blocking ring clearance for the reverse gear synchronizer is 0.5 mm (0.02 in).