sn95problems

What up Fellow Stang Owners! Bought my SN95 a few months ago from my neighbor. May as well have stolen it from them for what I paid. Either way, the car was half dead and barely running. I've done a decent amount on it thus far (tune up, coolant flush, oil change, & rear drums and brake pads)...

So I have a 95 GT (automatic) and whenever I floor it, the transmission doesn't release the gear when its supposed to, and when it does i get a terrible jerk, or it only changes the gear when I release the gas. Its completely stock except for a cold air intake. Spark plugs, spark plug wires and...