I took my 1991 Mazda MX-6 to a shop called Transmission Performance Center in Phoenix,AZ. Initially the individual I spoke with claimed he had a kit that he would put in my car that was designed to replace the parts that normally wear out over time and quoted me approximately $375 total cost. When I got to the shop I had to sign a paper stating if there were "hard parts" that were damaged, I would be responsible for the cost of those parts as well as labor. Needless to say, according to this shop I needed a complete re-build. I gave them the OK and they did the work. They issued a warranty for 12 months and 12,000 miles.
After I got my car back, I drove it normally for about 8 months and then began to experience a jerking at stop lights. Upon checking the tranny fluid I found it black and glistening with minute metal shavings. I immediately took the car back to the shop and after them keeping it for about 3 weeks, they notified me to come pick it up and that it had been re-repaired. I then drove the car normally for about a month and then took a short vacation and parked the car for about 5 days straight. Upon attempting to drive the car home when I got back from vacation, I noticed that the transmission was slipping and that power was not getting to the drive wheels. I then had about a month and a half left on the warranty. I took the car back again and the shop kept the car for about 2 and a half months so that the warranty was good and expired. I called during the 2 and a half months about 1 to 2 times per week and was given several excuses as to why it was not finished. Once I got the car back, I drove it from the shop to my house (9 miles), from my house to my job (10 miles) and as I was driving it back from my house, it completely broke down to the point that the transmission was slipping so bad that I had to push it about 800 yards to my house.
I called the owner of the shop the next day and asked him if he would repair the vehicle without charging but he stated that my warranty had expired and there was nothing he could do without charging. I spent $1400 on this repair and then had to spend an additional $1400 again. The shop that I took the car to after this fiasco stated that there was major damage inside the tranny and that they could not warranty the previous shops work.