My Buddies Truck is displaying some odd behaviors, PD123 all still work, Reverse acts like Neutral, and Neutral acts like D. I found online where someone said to put it in 1 and drive to 20 then let off the gas, if you experience engine braking then the reverse bands are fine. We did that and there was defiantly engine braking. I've never heard of this problem before, and was hoping someone might know whats going on.