help identify this transmission. Supposed to be A518

Thanks for looking.
I will try to call some transmission shops to see if they know if it might be causing the vibration. My bell housing does have the crank angle sensor cut out so this trans is probably off a magnum.
On the pic in the very top of my post, you can see the little weight on the bottom side of the converter. It has 1 each side. Do you think they are just balance weights to give the converter a neutral balance. So when I cut the 92g weight off I should leave these alone?