4L60E High Performance PT3 - Sonnax Super Hold Servos

In PT3 of the 4L60E High Performance series, I provide an overview of the Sonnax Super Hold servo kits for 2nd and 4th gear, assemble the servo, walk you through the installation and band clearance check. I also assemble the 1-2 accumulator using the pin‑less accumulator kit from Sonnax. For those installing this kit while the transmission is in the vehicle, you will want to achieve .075-.125 of servo travel. This will require grinding on the pin – Sonnax purposefully makes these pins too long so that you can grind to fit. View Sonnax instructions for more details: