Transmisson gear changes without any fill or slight kick. It t can be ECU unit problem, wirening problem or Transmission problem? If it's transmission problem, can Transmission from newer, 2002 and 2003 models may be replaced in to 2001 RX300. And if so, is 2002 and /or 2003 models have the same elecrtical connectors as RX2001?
Particularly one of 2002 and 2003 models nave 9 pin elecrtical connector. How many pins has 2001 model. The othe 13 pin connector is not a problem.