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4x2
- full-floating
- semi-floating
  - 3.23 ratio (opt GU5)
  - 3.42 axle ratio (opt GU6)
  - 3.73 ratio (opt GT4)
  - 4.10 ratio (opt GT5)
  - 4.56 ratio (opt HC4)
4x4

Rear Axle Assembly for 1987 Chevrolet R20 Suburban

Fits: 4x2 semi-floating 3.23 ratio opt GU5 (change)

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