GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2009 🢒 DTS 🢒 Transmission 🢒 Automatic Transmission - 4T80-E 🢒 Accumulator Housing Assemble

Special Tools

    • J 39630-2 Lower Control/Valve Body Gasket Guide Pins
    • J 36850 Assembly Lubricant (or equivalent)

For equivalent regional tools, refer to Special Tools.


    Object Number: 15484 Size: SH
  1. Inspect the accumulator housing for damage or scoring in the bores.
  2. Inspect all fluid passages for debris.

    3. Object Number: 15483 Size: SH
  3. Install new seals (947, 961) onto the accumulator pistons (946, 960).
  4. Install the following parts:
    5. 4.1. The forward accumulator pin (962) into the accumulator housing (944)
    4.2. The forward accumulator piston (960)
    4.3. The spring (963)
  5. Install the following parts:
    6. 5.1. The reverse accumulator pin (948)
    5.2. The reverse accumulator piston (946)
    5.3. The reverse accumulator spring (949)
  6. Install the following parts:
    7. 6.1. The accumulator housing cover gasket (964)
    6.2. The accumulator housing cover (965)

    Caution: Refer to Fastener Caution in the Preface section.

    6.3. The five 8 mm accumulator housing cover bolts (966) and tighten to 8-14 N·m (6-10 lb ft).

    Object Number: 509718 Size: SH
  7. Install a new seal (969) onto the 1-2 accumulator piston (968).
  8. Install the following parts:
    9. • The 1-2 accumulator spring (973)
    • The 1-2 accumulator pin (970)
    • The 1-2 accumulator piston (968)
    • The snap ring (349). Install the snap ring onto the 1-2 accumulator pin (970) after you have passed the pin through the top of the accumulator housing (944).
    • The 1-2 accumulator inner spring assembly (971)

    Object Number: 509725 Size: SH
  9. Install the following parts:
    10. • The 3-4 accumulator spring (950)
    • The 3-4 accumulator pin (977)
    • The 3-4 accumulator piston (975)
    • The snap ring (349). Install the snap ring onto the 3-4 accumulator pin (977) after you have passed the pin through the top of the accumulator housing (944).

    Object Number: 15486 Size: SH
  10. Install the checkballs (#1-4) into their proper cavities in the accumulator housing (944). Retain the checkballs with J 36850 Assembly Lubricant or equivalent.

    11. Object Number: 1652805 Size: SH
  11. Install the J 39630-2 guide pins into the lower control valve body gasket for the accumulator housing. Make sure that the 1-2 accumulator inner spring assembly (971) goes into the channel plate washer side down.
  12. Install the accumulator housing (944) onto the lower channel plate and install the bolts (534, 951, 952, 954) and hand tighten.
  13. Remove the J 39630-2 guide pins , install the rest of the accumulator housing bolts, including bolts (534) from the channel plate side and tighten to 8-14 N·m (6-10 lb ft).