Ok so to day my mom got me my first car its a 02 cav z24 and every thing works fine but one thing the damn transmission something is messed up every time i start to pull out of any where going up hill or just forward it gets up to about 15 mph then it jerks really hard and down shifts for no reason it could be a flat road and it will still do it and i have no clue what to do about it but if some one could help that would be great.