I have a lovely 1990 Chrysler New Yorker in very good condition with 80,000 original miles. In April of this year it had approx. 65,000 miles and I had to have the automatic transmission completely rebuilt for about 00.(canadian), but the work was done in California. The warranty was 6 months or 12,000 miles and had just expired. This week I noticed that on rare instances (once or twice in 300 miles) the automatic shift into low gear didn't seem quite as smooth so I decided to have it checked. I took the car to a Chrysler dealership, explained my concern and requested that they check things. After two hours of labour they advised that the mechanic could find nothing wrong and had "reset the codes". I picked the vehicle up and drove it less than one mile when the transmission started lurching very badly (enough to throw us forward against the seat belts). It did this approx. 5 times in 100'. I drove one more block to the house with the car placed manually in low gear and then called for a tow truck to take the car back to the dealership. I am now being told their transmission specialist (not the mechanic that did their original check and "code reset") had rechecked things and decided that I now need a new transmission. I am having a hard time with this explanation. The transmission had been working okay until I took it to the dealership (with the exception noted in paragraph one above). They work on it for two hours, give it back to me and now it is totally undriveable after driving it for less than one mile. I can't help but feel that their mechanics "tinkering" might be the problem. Is that possible? I would like to hear some opinions and advice on this problem, particularly how to deal with the dealership.