I'm getting OBD code P0756 [Shift Solenoid "B" Performance or Stuck Off],and the check engine light is on. The symptoms include the engine light blinking when the powertrain is under load either accelerating quickly or going up hill; the truck also shudders as if in a higher gear than it should be (if you've ever driven a manual transmission and accidentaly started out in 3rd intead of 1st, it's that same shudder.
I'm also getting OBD code [Cylinder 3 Misfire Detected] and yesterday decided to take care of the easy problem first and replace the spark plugs and wires (the engine was running a little rough also). When I took it out for a test drive, not only did the engine run great but I didn't feel any transmission shudder, shifting was smooth, and the engine light, although on, did not start blinking when trying to accelerate quickly.
I'm going to head out this morning and reset the codes and engine light, then take it out for a drive up some hills accelerating as fast as she can. I want to see if maybe the P0756 issue may have benn resolved by replacing the plugs and wires.
I don't know if it's possible that a bad misfire can cause a false transmission solenoid code, but that's what I'm hoping for.