Shifting back into D from N, highway coasting

[brucepick]

I think I finally nailed the optimum technique for shifting back into D from N.
At least in my car, but this likely will work for others.
I think you'll need a tach to do this, but most cars seem to have a tach these days.

This gives me a smooth shift back into D without losing road speed. Best of both worlds, imho.

Coast with foot off gas. Just before shifting into D, rest foot on accelerator. Shift to D. Immediately press down accelerator (moderately) to bring rpms up to their "level". That is, up to where they don't just keep climbing quickly, and the drive system fully engages.

Since my transmission is by AW, Aisin Warner, this method might work for many cars. According to Wikipedia, Aisin AW surpassed General Motors Powertrain Division as the largest producer of automatic transmissions in the world, and supplies automatic transmissions to 35 automotive manufacturers around the world, virtually every major OEM.

In a highway coast (N), my rpms drop to about 800-900. Back in top gear under moderate load at 50-60 mph, the rpms will be about 2000-2500. So how best to accomplish the change in rpms?

How far to press accelerator after returning to D? I think I'm pressing to about the same level as it would be for a steady cruise at the current speed. That is, just enough to put some power to the wheels. You'll have to find the right degree for your car.

You'll see the rpm's climb to the speed needed to match the road speed. After that the rpms will climb slowly as the engine accelerates the car - assuming you give it enough gas to accelerate the car.

Methods that didn't work:

1) Foot off gas, slide shifter back into D.
This gives me a 1-2 mph drop in road speed. Not ideal, but a smooth shift.

2) Rev-match before going into D.
This gives a hard shift into D as the system re-engages, with engine spinning somewhere 1500-2500 rpm. I've tried rev-matching to different rpms, hoping that the correct engine speed would give a smooth shift. Nope, at least not for my car. I finally decided those hard shifts might not be good for the tranny.

But the combination method seems to work well. Back into D with foot barely touching pedal. Then press down to bring up rpms. Try it a few times and let me know what happens.