HUMMER H1 USA Standard Gear Parts and Accessories

USA Standard Master Overhaul kit for the 'Model 20 differential

Part Number: SPZ-37065

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Estimated Ship Date: Feb 6, 2026 if ordered today

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USA Standard steel spool for Model 20 with 29 spline axles, 3.08 & up

Part Number: SPZ-59020

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Estimated Ship Date: Feb 6, 2026 if ordered today

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USA Standard Ring & Pinion gear set for Model 20 in a 4.56 ratio

Part Number: SPZ-36231

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Estimated Ship Date: Feb 5, 2026 if ordered today

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USA Standard Ring & Pinion gear set for Model 20 in a 4.88 ratio

Part Number: SPZ-36232

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Estimated Ship Date: Feb 9, 2026 if ordered today

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