1996 Honda Civic Transmission or not?

Hi, I have a question about my car transmission. Firstable, suddenly my km indicator started to jump from 20-220 km by it self. Second, sometimes when I drive, the car starts shaking and the engine almost turns off. I wonder if this problem comming from the transmission. I changed the trasmission oil, engine oil, added stop leak for both of them. I also changed wires and sparks. Now the problem was reduced, and it starts only when I stop on the red light or stop sign. If you have any idea about it let me know, and I will be very very happy if you find any solutions.
Thankyou very much on advance.
Vadim.