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Driveline and Axles

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Differentials

Rear Axle Family

GM 8.875 Inch 12-Bolt Car

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GM 12-Bolt Rear End Identification & Upgrade Guide

GM 12-Bolt Rear End Identification & Upgrade Guide

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Decode, ID, and upgrade your GM 12-bolt rear end. Learn axle specs, gear ratios, and best performance parts upgrades.

GM 10-Bolt Identification and Upgrades | 7.625, 7.5, 8.2, 8.5, 8.6

GM 10-Bolt Identification and Upgrades | 7.625, 7.5, 8.2, 8.5, 8.6

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GM’s 10-bolt rear axle has been around since the 1960s, here’s how to determine if your junkyard find is worth taking home

Ford 8.8 Rear End ID Guide | Widths, Codes & 8.8 vs 9"

Ford 8.8 Rear End ID Guide | Widths, Codes & 8.8 vs 9"

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Learn how to ID a Ford 8.8 rear end by tag, width, and code. Compare 8.8 vs 9-inch axles, decode gear ratios, and find which Ford models used them.

Replacing a G-Body 7.5" Bolt Rear End

Replacing a G-Body 7.5" Bolt Rear End

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Learn about the power behind the G-body platform and the steps to upgrade a 7.5" bolt rear end to a 8.5" to withstand high horsepower. See how to change the differential fluid and install new gaskets.

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