It's a pretty subtle difference. My money says it actually is working just fine. It's easiest to sense by starting from a stop and accelerating very slowly. You'll notice after repeating it with "power" on and off that the upshifts from gear to gear are actually delayed a bit in the "power" setting, occuring at a slightly higher rpm. There's also something about, if you put the tranny in 2nd and switch "power" on, it will start from a stop already in 2nd, but I haven't had cause to try that yet. That should be easy to sense, too.