don't let this happen to you!

I bought my '94 concorde in February, I thought I got a good deal on it. although the mileage is high the car is super clean on the inside and minor hood damage on the exterior I gave less than 1500. Three days after I bought it was the first time it didn't change out of second gear. I think the jerk at the car lot knew about this problem. I had the fluid and filter changed (I bought the parts, and no one bothered to tell me not to use the dexron-mercon, and that's what I bought) I've been using this mechanic for years, I called him but he was honestly clueless about this hazard. Of course, the fluid change didn't help. Everyone I talked to said they had never heard of a car with my problems. Now that I've got internet access. I find all this info. about "limp mode" and how the dexron-mercon burns up the chrysler tranys. To wrap this up, I put a new input vehicle speed sensor in my car, it took care of the code, but my transmission is ruined from the wrong fluid being it too long, although I have been told that taking so long to fix the sensor helped it along, an expensive rebuild it what I'm looking at. Hope I I've helped someone else avoid this costly mistake.