GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2006 🢒 Avalanche - 2WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4 Speed-MU4 🢒 First Reverse Brake Assembly Installation

Important: When installing new clutch discs in the 1st-reverse brake, the underdrive brake, the underdrive clutch, the intermediate brake, the forward clutch or the direct clutch assemblies, the new clutch discs MUST be soaked in Dexron®-III Automatic Transmission Fluid GM P/N 12346143 or equivalent, two hours prior to installation. This causes the clutch material on the discs to permeate with fluid which will aid in ease of assembly and prevent clutch overheating on first time engagement.


    Object Number: 165464 Size: SH
  1. Install the five plates (2) and the five discs (1) in the transaxle case in the following order:
    2. • Plate
    • Disc
    • Plate
    • Disc
    • Plate
    • Disc
    • Plate
    • Disc
    • Plate
    • Disc

    Object Number: 165466 Size: SH

    Important: The 1st-reverse brake flange must be installed with the flat side facing down and the stepped portion facing upwards.

  2. Install the 1st-reverse brake flange (2).

    3. Object Number: 165468 Size: SH
  3. Install the 1st-reverse brake snap ring (1) into the transaxle case (2).

    4. Object Number: 165470 Size: SH
  4. Measure the 1st-reverse brake assembly clearance using a feeler gage (2).
    5. • The 1st-reverse brake assembly clearance should fall within 1.06-2.38 mm (0.04170-0.0937 in).
    • If the 1st-reverse brake assembly clearance is above 1.06 mm (0.0417-in), inspect the 1st-reverse brake assembly for excessive wear.