GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra Denali 🢒 Transmission 🢒 Automatic Transmission - Allison 🢒 1-2-3-4 Clutch Piston Housing Inspection

    Object Number: 1580994 Size: SH
  1. Inspect the 1-2-3-4 clutch housing (1) for damage. Replace the housing if damage is present.
  2. Make sure that the orifice in the 1-2-3-4 clutch housing is not restricted. Clean any debris that is restricting the orifice.
  3. Measure the orifice in the 1-2-3-4 clutch housing for the specified size. Replace the housing if the specification is not met.

    4. Specification
    The 1-2-3-4 clutch housing orifice size is 0.85-1.15 mm (0.033-0.045 in).