I have an RX300 and an RX330. The RX300 was made in Japan while the RX330 was produced in the US. The 300 is tighter (no squeaks or rattles) while the 330 has been a pain. The throttle by wire on the 330 is not very smooth, the trans sometimes likes to hunt. Yes, the fluid is fine (color, type and level) The dealer claims that it will feel different and has the most recent upgrade. The 330 has intermittent rattles and makes me think that it is a Chrysler product. Comments? The 330 is ending I cannot wait