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chassis cab
- Without wide track
  - Automatic Transmission
    - 3.73 ratio (opt GT4)
    - 4.10 ratio (opt GT5)
  - Manual Transmission
    - 5 speed
      - 3.73 ratio (opt GT4)
      - 4.10 ratio (opt GT5)
    - 6 speed (opt ML6)
      - 3.73 ratio (opt GT4)
      - 4.10 ratio (opt GT5)
- wide track (opt GTY)
  - Automatic Transmission
    - 3.73 ratio (opt GT4)
    - 4.10 ratio (opt GT5)
  - Manual Transmission
    - 5 speed
      - 3.73 ratio (opt GT4)
      - 4.10 ratio (opt GT5)
    - 6 speed (opt ML6)
      - 3.73 ratio (opt GT4)
      - 4.10 ratio (opt GT5)
Excluding chassis cab
- brake opt JH6
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
- brake opt JH7
  - Automatic Transmission
    - 3.73 ratio (opt GT4)
    - 4.10 ratio (opt GT5)
  - Manual Transmission
    - 5 speed
      - 3.73 ratio (opt GT4)
      - 4.10 ratio (opt GT5)
    - 6 speed (opt ML6)
      - 3.73 ratio (opt GT4)
      - 4.10 ratio (opt GT5)

Rear Axle Assembly for 2006 GMC Sierra 3500

Fits: chassis cab wide track opt GTY Manual Transmission 6 speed opt ML6 3.73 ratio opt GT4 (change)

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