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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Brakes 🢒 Park Brake 🢒 Brake Drum Replacement

Brake Drum Replacement Bendix 229mm - 9in

Removal Procedure

    Object Number: 29070 Size: SH
  1. Block the wheels.
  2. Remove the propeller shaft. Refer to the following procedures:
    3. • Propeller Shaft Replacement - One Piece - Flange Type
    • Propeller Shaft Replacement - One-Piece - Yoke Type
    • Propeller Shaft Replacement - Two Piece - Flange Type
    • Propeller Shaft Replacement - Two Piece - Yoke Type
    • Propeller Shaft Replacement - Three Piece - Flange Type
    • Propeller Shaft Replacement - Three Piece - Yoke Type
    • Propeller Shaft Replacement - Four Piece - Flange Type
    • Propeller Shaft Replacement - Four Piece - Yoke Type
  3. Remove the following items from the center of the yoke:
    4. • The companion flange bolt
    • The washer
    • The retainer
  4. Straighten the lock tab on the washer.
  5. Remove the brake drum (8) and the yoke assembly from the transmission.
  6. Remove the bolts that hold the drum (8) to the yoke.

    7. Important: Closely examine all mounting bolt holes in the drum for stress cracks.

  7. Inspect the drum (8) for the following:
    8. • Cracks
    • Scoring
    • Pitting
    • Grooves
    • Overheating damage
  8. Replace the drum as necessary.
  9. Inspect the linings (1) for contamination and excessive wear. The minimum lining thickness (with bonded linings) is 1.52 mm (0.060 in).
  10. If replacement is necessary. Refer to
  11. Parking Brake Shoe Replacement .
  12. Inspect the brake mechanism for proper operation.
  13. Repair the brake mechanism as needed.

Installation Procedure

    Object Number: 29070 Size: SH
  1. Install the bolts that hold the drum (8) to the yoke.
  2. Install the drum yoke assembly to the transmission.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the companion flange bolt to the transmission mainshaft at the center of the yoke.

    4. Tighten
    Tighten the companion flange bolt to 140 N·m (103 lb ft).

  4. Install the new washer to the transmission mainshaft at the center of the yoke.
  5. Install the propeller shaft. Refer to the following procedures:
    6. • Propeller Shaft Replacement - One Piece - Flange Type
    • Propeller Shaft Replacement - One-Piece - Yoke Type
    • Propeller Shaft Replacement - Two Piece - Flange Type
    • Propeller Shaft Replacement - Two Piece - Yoke Type
    • Propeller Shaft Replacement - Three Piece - Flange Type
    • Propeller Shaft Replacement - Three Piece - Yoke Type
    • Propeller Shaft Replacement - Four Piece - Flange Type
    • Propeller Shaft Replacement - Four Piece - Yoke Type
  6. Adjust the parking brake. Refer to Parking Brake Shoe Adjustment .
  7. Remove the wheel blocks.

Brake Drum Replacement Bendix 305mm - 12in

Removal Procedure

    Object Number: 198564 Size: SH
  1. Block the wheels.
  2. Release the parking brake.
  3. Raise at least one rear wheel up.
  4. Remove the propeller shaft. Refer to the following procedures:
    5. • Propeller Shaft Replacement - One Piece - Flange Type
    • Propeller Shaft Replacement - One-Piece - Yoke Type
    • Propeller Shaft Replacement - Two Piece - Flange Type.
    • Propeller Shaft Replacement - Two Piece - Yoke Type
    • Propeller Shaft Replacement - Three Piece - Flange Type
    • Propeller Shaft Replacement - Three Piece - Yoke Type
    • Propeller Shaft Replacement - Four Piece - Flange Type
    • Propeller Shaft Replacement - Four Piece - Yoke Type
  5. Remove the nuts that hold the yoke and the brake drum.
  6. Remove the yoke.

    7. Object Number: 199968 Size: SH
  7. Remove the drum. It may be necessary to back the linings (17, 25) off by turning the adjusting screw (21).

    8. Important: Closely examine all of the mounting bolt holes in the drum for stress cracks.

  8. Inspect the drum for the following conditions:
    9. • Cracks
    • Scoring
    • Pitting
    • Grooves
    • Overheating damage
  9. Replace the drum as necessary.
  10. Inspect the linings (17, 25) for contamination and excessive wear. The minimum lining thickness (with bonded linings) is 1.52 mm (0.060 in).
  11. If replacement is necessary, replace the linings (17, 25) as a set.
  12. Inspect the brake mechanism for proper operations.
  13. Repair or replace the brake mechanism as necessary.

Installation Procedure
  1. Install the drum.

    2. Object Number: 198564 Size: SH
  2. Install the yoke.

    3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the nuts.

    4. Tighten
    Tighten the nuts to 37 N·m (27 lb ft).

  4. Install the propeller shaft. Refer to the following procedures:
    5. • Propeller Shaft Replacement - One Piece - Flange Type
    • Propeller Shaft Replacement - One-Piece - Yoke Type
    • Propeller Shaft Replacement - Two Piece - Flange Type.
    • Propeller Shaft Replacement - Two Piece - Yoke Type
    • Propeller Shaft Replacement - Three Piece - Flange Type
    • Propeller Shaft Replacement - Three Piece - Yoke Type
    • Propeller Shaft Replacement - Four Piece - Flange Type
    • Propeller Shaft Replacement - Four Piece - Yoke Type
  5. Adjust the parking brake. Refer to Parking Brake Shoe Adjustment .
  6. Remove the wheel blocks.

Brake Drum Replacement Rockwell 305mm - 12in

Removal Procedure

    Object Number: 200095 Size: SH
  1. Block the wheels.
  2. Release the parking brake.
  3. Raise at least one rear wheel up.
  4. Remove the propeller shaft. Refer to the following procedures:
    5. • Propeller Shaft Replacement - One Piece - Flange Type
    • Propeller Shaft Replacement - One-Piece - Yoke Type
    • Propeller Shaft Replacement - Two Piece - Flange Type
    • Propeller Shaft Replacement - Two Piece - Yoke Type
    • Propeller Shaft Replacement - Three Piece - Flange Type
    • Propeller Shaft Replacement - Three Piece - Yoke Type
    • Propeller Shaft Replacement - Four Piece - Flange Type
    • Propeller Shaft Replacement - Four Piece - Yoke Type
  5. Remove the nuts that hold the yoke and the brake drum.
  6. Remove the yoke.
  7. Remove the drum.

    8. Important: Closely examine all of the mounting bolt holes in the drum for stress cracks.

  8. Inspect the drum for the following conditions:
    9. • Cracks
    • Scoring
    • Pitting
    • Grooves
    • Overheating damage
  9. Replace the drum as necessary.

    10. Object Number: 200102 Size: SH
  10. Inspect the linings (4) for contamination and excessive wear. The minimum lining thickness (with bonded linings) is 1.52 mm (0.060 in).
  11. If replacement is necessary, replace the linings (4) as a set.
  12. Inspect the brake mechanism for proper operations.
  13. Repair or replace the brake mechanism as necessary.

Installation Procedure

    Object Number: 200095 Size: SH
  1. Install the drum.
  2. Check the drum and yoke alignment in order to provide holes for an adjustment without removing the drum.
  3. Adjust the drum and yoke alignment if necessary.
  4. Install the yoke.

    5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the nuts.

    6. Tighten
    Tighten the nuts to 37 N·m (27 lb ft).

  6. Install the propeller shaft. Refer to the following procedures:
    7. • Propeller Shaft Replacement - One Piece - Flange Type
    • Propeller Shaft Replacement - One-Piece - Yoke Type
    • Propeller Shaft Replacement - Two Piece - Flange Type
    • Propeller Shaft Replacement - Two Piece - Yoke Type
    • Propeller Shaft Replacement - Three Piece - Flange Type
    • Propeller Shaft Replacement - Three Piece - Yoke Type
    • Propeller Shaft Replacement - Four Piece - Flange Type
    • Propeller Shaft Replacement - Four Piece - Yoke Type
  7. Adjust the parking brake. Refer to Parking Brake Shoe Adjustment .
  8. Remove the wheel blocks.