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Rear ends

By chris aynes
November 16, 2023 in 1999-2013 Silverado 1500 & Sierra 1500

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chris aynes

Posted November 16, 2023

Posted November 16, 2023

Is a 3.73 compatible with .3.40

Senior Enthusiast

txab

Posted November 16, 2023

Posted November 16, 2023

If you're talking about a 4WD vehicle comparing front to rear, then no they are not compatible for use simultaneously. Both diffs need to be same ratio. So if you're doing a diff swap then matching is a must.

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