While driving aout 50 mph in drive truck suddenly downshifted to second gear locking the rear tires up and nearly getting rear ended by another car. The drive indicator light was flickering and the manual M2 was lit up as if it didnt know if it was in manual shift mode. stopped on the side of road and turned vehicle off and back on but problem continued. About a mile or so down the road the problem stopped. taking to the dealer today to have checked out. no codes were thrown.