GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Chevrolet W-Series Commercial W4 (W3500/W4500) 🢒 Transmission 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 4th Clutch Assembly Installation

    Object Number: 335059 Size: SH

    Note: Removal of the fourth clutch backing plate retainer ring, the fourth clutch backing plate, and the fourth clutch plates will ease assembly of the overrun clutch housing assembly.

  1. Remove the fourth clutch backing plate retainer ring (523) from the fourth clutch housing (529).
  2. Remove the fourth clutch backing plate (524).
  3. Remove the clutch plates (525, 526).

    4. Object Number: 335061 Size: SH
  4. Install the fourth clutch housing (529) into the transmission case assembly.

    5. Object Number: 31110 Size: SH
  5. Install a new fourth clutch housing bolt (26).

    6. Caution: Refer to Fastener Caution in the Preface section.

    Note: Do not over torque the fourth clutch housing bolt (26).

  6. Tighten the fourth clutch housing bolt (26) to 23-26 N·m (17-19 lb ft).