I have a 1972 Plymouth Roadrunner. The car is never pushed or abused. It is mostly used for leisure and for neighborhood auto shows. the car is never abused and it is always driven with safety in mind. I just had the transmission rebuilt. Within 5 days, the transmission "went" again, and had the same issue as it did before. The shop told me that the 'planet" was shuttered and that it is my fault for abusing it therefore it is not their responsibility. The car got stuck inside my neighborhood at 10 miles per hour. Is is even possible that the planet shutters due to a factory defect? How does this work?