my 4x4, abs and brake indicators light up right after I start running.

What is your question?

I took it to a specialty shop and the diagnostic read mechanical problem with the transfer case. Is this a major problem or could it be a sensor gone bad? Also, sometimes after I shut down I can hear a "racheting" sound that comes from underneath the car. the car also feels slugish and acts like it's going to completly stall, this usually happens when I take the car to 5000RPMs. What I do is I shut the car down and when the I restart it the car acts normal but check engine light stays on. I don't rev the car so it wont start to act up .