Check the listing for details. B&M Transpak Automatic Trans Shift Kit for TF A727 A904 1966-77 Chrysler Dodge. Condition: New. Listed at 204.95 USD. Fits 1966 to 1977 Chrysler, Dodge, Plymouth Torqueflite A727 and A904 automatic transmissions Recalibrate your automatic transmission for optimum performance! Select the mode that best suits your application Improves transmission life Transmission removal not required APPLICATION: 1966 to 1977 Chrysler, Dodge, Plymouth TF A-727 and A-904 The next step up from the Shift Improver Kit is the Transpak. It has all the features in the Shift Improver Kit plus it provides additional driver manual control (GM TH-400, 350, Ford C-6 and Chrysler Torqueflite only). Most stock automatic transmissions won't downshift into low gear above 15 mph, and automatically upshift at a predetermined speed no matter what gear you're in. With the Transpak, you can downshift at any speed, and you can hold.