I HAVE A 99 TRACER GS AND WHEN I GO TOSTART IT, IT MAKES A HARD KNOCKING KIND OF NOISE AND AFTER IT STARTSIDLEING ITSTILL KNOCKS AND IT SEEMS TO BE GETTING WORSE EVERY DAY. IT KNOCKS IN ALL OF THE GEARS AND DOESNT GO AWAY WHEN YOU PRESS ON THE GAS. PLEASE HELP THANKS.

Check your engine mounts. If it's doing it when you're accelerating you could be lifting your block.

is it the tranny knocking or the engine? if its the engine your ooil is low or you have an valve leak or you could have a bad valve? im notsure about your tranny if its the problem check your oil level if its ok then you prob more than likely is a bad valve or valves.