I drive '01 honda prelude, manual transmission. Problem: when starting my car, engaged in 1st gear, it won't start , the car heaves forward, the front of the car shakes alot. I can start it in neutral easily but unable to put in reverse or 1st gear. This doesn't happen all the time, there are days the car runs smoothly. Sometimes, when changing gears, it feels like it doesn't go smoothly, I almost have to force it into gear. The clutch pressure doesn't feel different at all. What I have to do when it acts up, is turn the car off and on several times, keep trying until it finally operates properly. Today, I had some trouble but got it going but while driving it would not go into 4th, and I could not down shift. Had to pull over, turn off ignition and restart. Then when I stopped at stop sign, I could not shift into 1st. Had to turn off and restart engine. Question: what is the cause and is it going to be expensive to repair??? thanks for your input!!