Check engine light came on and then noted then in the drive forward gears the rpm goes up with no response from the engine. The D4 starts blink. Seems to do fine in D1. Cold, the car responds then it deteriorates.

Got a P070 and P170 code.

Going to start with transmission fluid flush DIII and then replace with Honda ATF.

Any other tips or guidance would be appreciated.

 

Transmission is likely gone, is this a V6 by chance? If so, don't waste your time and just replace the transmission. If it's a 4 cylinder, go ahead and do your flush but it's pretty likely to need a transmission rebuild or replacement.