GM 8.5" Ring & Pinion Gear Set (3.42 Ratio) GM85342 / SET76

GM 8.5-inch ring and pinion gear set, part number GM85342 / SET76, designed for 1986–1987 Buick Grand National, Turbo T, and T-Type models. This is the correct 3.42:1 factory performance ratio, providing the perfect blend of highway drivability and off-the-line punch that made these cars legendary.

🟢Green Dot: Solid, used parts that work as promised. Verified functional when removed and often include part numbers or instructions. The product isn’t perfect, and may have visual defects, but overall it’s in good condition. These are a steal at 30% to 60% off retail. 

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As-Is Condition: We inspect every part before it hits the listing, but we recommend you double-check compatibility with your project. 

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