It was my mistake to use the Dexron -IV synth instead of T-IV in my RX330, but it seems working fine for last 30,000 miles. I have no problem of any kind.
I understand the T-V is synth transmission fluid like Dexron -Iv synth.
I am planning to do next transmission fluid change and trying to decide if I want to get T-V or stay with Dexron I-V synth.