my new car is jacked up

i just baught a 95 eclipse non turbo automatic. The transmission is acting funny. While driving the transmission will stay in a gear and stay at high rpms for a while before shifting into the next. Then when I stop the car acts like it still wants to go (stays at 1800 or so rpms instead of 800 where it is supposed to idle. Whats going on?

Doesn't make it the trans guy , could be a fuel / emission issue. My TPS went out a while back and the RPMS were up around 1400 in nuetral :/ do you have a CEL light on ? is there smoke or liquids coming the the exhaust pipe ?

The only way a auto will stay in gear at high rpms is if it's continually being feed power up around the 5500 - 6000 rpm range then force shift into the next gear. How many miles on the car ? does it look abused ? do a carfax and see the service records.

The transmission not shifting is a different problem than your high idle in gear I think. When was the last time you changed the tranny oil and filter? That should help with the odd shifting. Do you have any CEL's like Mazda said?