Running the 700-R4/4L60-E family of transmissions at extreme power levels demands innovative parts designed not only to work better, but to work better together. From street/strip upgrades and heavy-duty jobs to top-tier racing builds, Sonnax makes it easy to deliver rock-solid transmissions customized for any performance level.
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.