i have a 2995 neon stock. i just installed a transmission and new cv axles. but with the car on jack stands when you shift it into gear there is a very violent shaking and poumding. when you take your foot off of the brake it stops and everything works normally. but since my foot had to press the brake to stop the wheels it caused the passenger side axle to pop out into the inner boot. also while on jack stands and in gear when idling the driver side tire does not move. its doing the exact same thing it did before the new transmission and axles. I dont know what the problem could be, please help.