Ok. With all 4 wheels in air, ignition on, engine off. Turn switch to 4WD, hear disconnect, don't seem to hear anything from TC motor. 4WD lite flashing, 2WD on steady. Turn switch back, huh, sounds like TC motor made a noise!! Turning to 4WD, nothing from TC motor, but turning back it seems to make a noise, unless my hearing is really going. When switch is on 4WD (lite flashing) either front wheel cannot turn if the other is blocked. Guess that means the disconnect is working. Removed TC motor but left connected. Turned switch to 4WD, motor turns, about 120 degrees I estimate. Lite at 4WD still blinking. Turned back to 2WD, oh crap, motor initially backs up but then reverses and goes around 360 degrees, stopping at same position it went to when I switched to 4WD!! By turning switch back and forth between 2WD and 4WD I managed to get back to where it was when I started. I also tried the old motor, made noise but moved very little. Could the TC be jammed, maybe damaging the motor? I am 3rd owner, changed TC fluid at 125K about 1K ago. Looked OK, bit darker than new stuff but not sludgy. Also, at some point, service 4WD lite came on.