Here's how to race your automatic transmission:

LEAVE IT IN D4.

If you want to race from a stoplight, LEAVE IT IN D4 and depress the brake fully. Rev it up to a couple hundred RPM, then floor it and release the brake when the light turns green.

Revving in neutral and then putting it in D4 destroys your transmission.

Upshifting (1-2-3-4) manually on an automatic tranny is stupid. It 1) will break your tranny faster and 2) you'll upshift slower.

Stop pretending.