GM Service Manual Online
For 1990-2009 cars only
  1. Clean the transmission case in a suitable solvent. Air dry the transmission case.

  2. Object Number: 38531  Size: SH
  3. Inspect the transmission case for the following conditions:
  4. • Damaged threaded holes
    • Cracks
    • Scratches
    • Damaged threads
    • Burrs
    • Nicked mounting surfaces
    • Damaged sealing surfaces
    • Damaged front or rear bearing bores
  5. Replace a cracked housing.

  6. Object Number: 38538  Size: SH
  7. Inspect the countershaft bearing race bore for the following:
  8. • Wear
    • Scratches
    • Grooves
  9. Inspect the machined mating surfaces for flatness. Check the mating surfaces with a straight edge.
  10. Use a fine mill file to dress minor scratches or burrs.

    Replace the transmission case if the countershaft bearing race bore is worn or damaged.