PONTIAC FIREBIRD Differential & Rear-End Components

Ring and Pinion Gears and Installation Kit, 8.5" GM 3.90 REAR R&P GEAR/ INSTALL KIT PACKAGE with 28spl POSI & AK 1563 AXLE BRGS (2.25" OD)

Part Number: YGA-12629

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Estimated Ship Date: Dec 8, 2025 if ordered today

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Ring and Pinion Gears,USA Standard 7.5"/7.625" GM, 3.23 Ratio Rear Ring & Pinion GearInstall Kit 28 Spline and 2.25" OD Axle Bearings & Seals

Part Number: SPZ-10699

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Estimated Ship Date: Nov 24, 2025 if ordered today

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Ring and Pinion Gears,USA Standard 7.5"/7.625" GM, 4.11 Ratio Rear Ring & Pinion GearInstall Kit 28 Spline and 2.25" OD Axle Bearings & Seals

Part Number: SPZ-10702

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Estimated Ship Date: Nov 24, 2025 if ordered today

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