Mine (1995 V6) did that a few years ago. The automatic transmission was fried. Spend $3,500 on a rebuild. I also had other problems though. Like the transmission would not shift to drive (the shifter was in D, but stepping on the gas did nothing). But, the main symptom was very hard shifting --- like someone kicking you in the pants every time the transmission changed gears --- accompanied by a knocking sound.
Richard
