Chrysler Repair: 94 V-6: crank sensor/flex plate no match?, crankshaft bearings, crank shaft

Question
Is it possible for your flywheel to move.Causing your synochrization of crank shaft to not recogonize the sensor.  I am just a regular girl whose mechanic may be taking her to the cleaners again.
I asked a second opinion and he said do not let them pull your engine.  He would bet that it was just the crank shaft sensor.

Answer
Hi Lynn,
I don't know of anyway for it to move, and the correct term is the 'flex plate', not the 'flywheel', in any case. The crank sensor is inserted into the transmission housing so as to come in close contact with the flex plate, which has cutouts that provide the position information. The flexplate is firmly bolted to the crankshaft so cannot come loose. It is theoretically possible for the wear of the crankshaft bearings to be large enough for the sensor to not be close enough to the sensor when it rotates but I have not heard of that being a realistic possibility. If a readout of the fault codes stored in the engine controller was a code 11, that would mean the crank sensor signal was not available. Almost always this is solved by putting in a new sensor. The sensor has a paper spacer on its tip so that when you put it in contact with the surface of the flex plate it will be just the right distance to cause the sensor to detect to cutout but not so close as to be damaged by the surface of the plate. You have to hold the sensor with its tip against the plate (with the paper spacer still on its tip) then while holding it in that position tighten the screw that retains it in that position. If you allow it to move back from that contact position then it won't work.  
There is no basis that I know of for the engine having to be "pulled" because the flex plate 'moved'. Ask them what is measurement data they have taken that shows 'movement'? What specification are they comparing the measurement against? What have they done so far and how much money do they want to charge you for that? The crank sensor needs to be changed or the 3 wires that connect it to the engine computer need to be checked for continuity is what makes sense to me.
Roland