GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Metro 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 3 Speed-M60 🢒 Parts Cleaning and Inspection

       Caution: When you use compressed air in order to clear fluid passages and to dry parts, always aim the air pressure away from face and eyes. Always wear adequate eye protection in order to avoid injury from dirt and debris that may adhere to parts.

       Notice: The automatic transaxle is an assembly that relies on hydraulic operation. This unit contains numerous seals, O-rings and gaskets that are set to very close tolerances. Any introduction of foreign matter can cause a hydraulic failure. Therefore, all facets of repair operations must be carried out in a clean work environment.

       Important: 
   • Keep work areas and tools clean.
   • Do not use wipe cloths or rags.
   • Do not use solvents on the following parts:
      - Rubber seals
      - Plastic/Teflon® thrust washers or spacers
   • Make sure that all fluid passages in the case and valve body are clear and free of any obstruction.

    • Blow out all fluid passages with compressed air.
    • Clean out small passages with fine wire.
    • Handle all parts carefully in order to prevent damage.
    • Clean and dry all parts before reassembly.

       Notice: Use J 36850 or equivalent during assembly in order to retain checkballs or to lubricate components. Lubricants other than the recommended assembly lube changes the transmission fluid characteristics and causes undesirable shift conditions or filter clogging.

    • Clean case components thoroughly with solvent.
    • Air dry. Do not wipe with cloths or rags.

Inspection Procedure
  1. Inspect the case exterior for cracks or porosity.
  2. Inspect the case-to-valve body surfaces for damage.
  3. Inspect the vent assembly for damage.
  4. Check all fluid passages with compressed air.
  5. Inspect the intermediate servo bore and accumulator bores for the following conditions:
    6. • Damage, porosity or burrs
    • Remove any sharp edges with a fine emery cloth
  6. Inspect the speedometer driven gear and vehicle speed sensor bores for the following conditions:
    7. • Damage
    • Sharp edges
    • Porosity
  7. Inspect all bolt holes for thread damage. If you find thread damage, refer to Thread Damage Repair in Engine Mechanical.
  8. Inspect the case interior for the following conditions:
    9. • Damaged ring grooves or casting flash
    • Worn or damaged clutch plate lugs
  9. Inspect the case exterior for the following conditions:
    10. • Scarred or damaged gasket mating surfaces
    • Cracks or porosity. For porosity repair, refer to Fluid Leak Diagnosis
  10. Inspect the fluid seals on the drive axle shaft for cuts or damage. For replacement, refer to Drive Axle Shaft Fluid Seal