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dual rear wheels
- 10-1/2" ring gear
  - 125" wheelbase
  - 146" wheelbase
- 9-3/4" ring gear
  - 125" wheelbase
  - 146" wheelbase
single rear wheels
- full-floating
- semi-floating

Rear Axle Assembly for 1991 GMC G3500

Fits: dual rear wheels 10-1/2 ring gear 125 wheelbase (change)

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