i have a 92 dodge shadow with an automatic trans. all of a sudden a few weeks back it wouldn't go into reverse when the car was cold. along with this, it was having problems going into third gear. this also was at its worst when the car was cold. so i tried changing the transmission fluid. i did not notice an abnormal amount of shavings in the bottom of the pan. after changing the fluid, reverse has never failed me again. but i'm still having trouble getting into third. ive noticed that by bringing it up to 4000 rpms and taking my foot off the gas usually gets it to switch. now that the weather is getting colder even that method is started to get worse. fluid levels are fine. any ideas on if i need a new trans or possibly something may be sticking? any help would be appreciated!