Under certain scenarios, the 722.9 conductor plate can be replaced. It all depends on which fault codes are stored. We've been performing this repair for about a year or so. In fact, we replace far more conductor plates than valve bodies.

Unlike the 722.6 transmission, the .9 transmission control unit is integrated into the conductor plate (yes, it actually lives inside the transmission, immersed in ATF). List price at my dealer is about $350, and includes a new filter, gasket, and pan bolts.