My '65 Dart GT has the 904 Torqueflite with the 235hp 273 engine. The engagement is rough when shifting from Park to Drive, or Neutral to Drive. The lowest I can get the idle adjusted to is around 650-700rpm. I have seen some specifications that show the idle should be as low as 475-500 rpm for the V8 automatic combination. I don't think the car should "jump" like it does even with my higher idle setting. The transmission works perfectly otherwise. I don't know a lot about this transmission, so I'd appreciate any suggestions.