Some recent info I got from a post/email:
- US Gear uses electric solenoids and do not like the rain, sand and salt uses up here in the PNW. May work nice else where.
- BD and Pac both nice, quality units. BD has better midrange retarding power, Pac has better high end retarding power.
Since you have an auto, go with the DTT Smartcontroller. Cost more than the others, but has WAY more features, and its truely automatic. For example a downshift from OD to 3rd locked up when the speed drops way down, DTT will do this automatically at a user adjustable speed, an autoloc you have to press the O/D lockout button, then give it throttle until the PCM engages the lockup clutch, then backoff to get the ebrake effects again. There many other cool features such as the TC saver feature. All in one unit.