273 Commando automatics....what's special?

1965 thru 1967 'A-904' Transmission

'Heavy-Throttle' Upshift Points ~ Dart, Valiant and Barracuda

Gear Upshift ........273 {2-Barrel} ............ 273 {4-Barrel}
* 1st to 2nd .......... 42 MPH ...................... 45 MPH
* 2nd to 3rd .......... 67 MPH ...................... 80 MPH

'Heavy-Throttle' Upshift Points ~ Dart and Valiant 'Station Wagon'

Gear Upshift ...... 273 '2-Barrel'
* 1st to 2nd .......... 38 MPH
* 2nd to 3rd .......... 63 MPH