There are 5 choices

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Front Axle
- 2.73 ratio (opt GU2)
- 3.08 ratio (opt GU4)
- 3.42 axle ratio (opt GU6)
- 3.73 ratio (opt GT4)
- 4.11 ratio (opt H04)

Rear Axle Carrier for 1983 GMC S15 Pickup

Fits: Front Axle 3.73 ratio opt GT4 (change)

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