February 08, 2018

Harness that Horsepower! Your Guide to a Sonnax 4L60/E Level 3 Performance Build

Presented by Sonnax

The GM 4L60/E series are great transmissions used for decades in performance vehicles, but their reputation has somewhat suffered because old-school mods never significantly improved durability. Especially in extreme racing applications, modern horsepower demands modern parts, and that's what Sonnax delivers.

This video breaks down how to transform a 4L60-E, 4L65-E or 4L70-E into a top-tier performance transmission with Sonnax Level 3 build components. Many parts also are found in Sonnax heavy-duty and Level 1 and Level 2 performance builds, so no matter what power level you're running at, it's a great way to understand the options when upgrading 4L60/E series units.

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