Porblem with my Tranny, HELP!! Options

[celicagt94]

ok i have an AUTOMATIC 94 gt

i have a problem when i drive it, sometimes when i come to a stop then attempt to go the car goes to neatral then kicks into 1st

its been doing this for a long time, since i have gotten the transmission replaced back in may. it stopped for a while but its doing it again. Ill be pushing the pedal to accerletate and the engine revs but doesnt go at first then i feel it shift and go forward.

also, i dunno if this is normal but when im drving down the highway and i release the pedal(gas) the rpms drop then they go up again. i have heard it since i have gotten my muffler. it gives a low sound as the rpms drop then it has a little rev again

i dunno why this is happening but i do know that i rather see wut u guysd say first then take it to a shop and get lied too.

now that i think about it perhaps the cold air is somewhat affecting it, i remember it used to do that "neutral to first" thing when i first replaced the transmission then it stopped for a long time and is now back.

i dunno much about engines but i do know that automatics has a clutch and perhaps i need a new one, how much does that cost?