December 30, 2013
Required tool kit F-68942-TL27 is no longer in production. Check with your distributor for availability.
The 2-3 overlap control valve, controlled by EPC (modulated pressure) and shift valve pressure, is used to gradually reduce the pressure to the disengaging K3 clutch, during the 2-3 up shift. The Mercedes 722.6 transmission uses clutch-to-clutch transitioning during shifts, so timing is very critical to prevent shift complaints like flares or bind-ups. Reconditioning the bore and installing Sonnax oversized 2-3 overlap control valve kit 68942-27K restores OE shift pressures for proper timing and function.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.