I hear you. I speaking to the one theory of why the chain broke or better said why it was ruled out as a possibility(front and back trans : gear ratio/actually selected gear at the time/size of tires/engines RPM). It was ruled out as a possibility because of torque converter slippage. My question was do they not "lock up" when commanded to? How does this effect synchronising the front/back? May still not have any thing to do with it, just asking.
Ouch. You could lay a long set of "burnout appearing" marks dragging the rear. Or at least as long as the trany held.