GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 No Second Gear - D4

Checks

Cause

Case (7)

The intermediate clutch feed cup plug is missing or the cup plug is not seated.

Intermediate Clutch Components

  • Backing Plate (630)

Broken

  • Retainer Ring (633)

Missing or not seated

  • Friction Plates (631)

Worn

  • Outer Race (625)

Worn Splines

  • Center Support (640)

The support is cracked or the feed hole is blocked.

  • Center Support Bolt (25)
    • The bolt is broken or loose.
    • The oil hole is blocked.
  • Seals (637, 638)

Worn

  • Piston (636)

Cracked or jammed

  • Springs (635)

Jammed

  • Transmission Fluid
    • Improper fluid
    • Additive package
  • Intermediate Sprag (624)
    • The outer race splines are worn.
    • The outer race is broken.
    • The splines or the inner race is worn.
  • Direct Clutch Housing (623)

Broken

  • Retainer Ring (627)

Missing or not seated