Here is the problem. Sometimes when I start to take off the car seems to have no power and then it takes off. Sometimes when I am driving at highway speeds (55-60) the car seems to stumble and will shake. It shakes enough to move the stearing wheel somewhat violently. I dont notice the rpms reving higher at anytime, would that happen if it were the transmission slipping?
It has 143000 miles but the engine runs great. Starts 1st time everytime. It idles at about 1200 rpm and the tack stays right there. no bouncing what so ever.