Z-MAN

Drove trough deep water due to thunderstorms. Two days later I get P1755 and the tranny is shifting like crap, high RPM in the first gear, shifting unexpectedly in second gear or third or downshifting. Did research online and determined is the TTVA. Spent $290 online, ordered, received and replaced the TTVA. I did wait more than one minute after I turned the ignition key to the ON position and before I actually started the engine. Easy job but my truck didn't get any better. I wonder what else could be, any ideas out there? Any help is highly appreciated. Thanks