wow, just another example of Autozone people not knowing what theyre talking about.
The AW4 IS NOT a chrysler transmission, it is used mostly in Toyotas. Therefore, it does NOT use ATF4, which Chrysler formulated. They actually told the dealerships to use ATF4, then for some reason
transmissions started failing after scheduled maintenance/trans work.. After a year or two, Chrysler Removed this change from the books and told the Dealerships to use DEXIII (though some places still use atf4 and kill transmissions...).
ATF4 is bad for the AW4 because it is synthetic and actually is too "small" of a molecule and too slippery, It slips past seals and valves in the transmission and ends up burning up clutches and causing other damage. Especially in older transmissions.
If you have the time and money, I would drop the pan, change the filter, and add (I think its 3 qts?) of Proper DexIII fluid. After that, you should be set for a while.
You may find this persons experience with ATF4 helpful...
As for the jerking, Are the revs going up and down or is it just the trans? If the revs are going up and down you may just have a sensor out of adjustment...