Did you have the trans in Park or Neutral? A lot of Mopars need it in N or it gets foamy. That's the easy part. The bad part is, if it is slipping, it's broke. There just isn't a lot of friction material on the band and clutch plates these days. Just takes a few slips and you get mucho heat and warped plates. It may continue to work for some time, but I wouldn't trust it. JMTCW.
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