My recently rebuilt A/T was working fine. Simultaneously, the speedo went to 0, the tranny self-downshifted from 5th to 4th, VSA System light, and VSA activation indicator ON, flashing green D indication, + check engine light.
Tranny cannot be selected to REV or Park (lever locked). Keys cannot be removed from ignition.
Any theories? It's back to the shop Monday morning. Thanks