i got a 99 and had a very similar problem i only had 2nd and reverse, it turned out to be the high speed shift solinoid(located under the bettery on my 99...a wire hooked to it and screws into the transmission) Bought a new one..unplug the wire, unscrew it...screw in the new one , replace the wire and problem was solved, about a yr later same thing happened to my dodge stratus. i replaced it the same way and fixed it also...hope this helps...
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