SES, TCS, no tach, hard shift...Please help.

[v8soldier]

Yeah, we figured out what it was marine. It was the TFP switch valve in the transmission valve body. After we replaced that and did a tranny flush it was fine. The other code I had was an O2 sensor and a vac leak. I've put on both O2 sensors and I'm about to put on a new MAP sensor and EGR valve. The tach is still a mystery though. The TCS light we think is the switch itself in the dash, it doesn't do anything at all when we push it and we have fixed the tranny problem and tested the circuits so that has to be it. Thanks to everybody for the input.