Do the bands ( if any adjustments on them...), change the fluid and filter and you should be good to go. Just make sure you put the correct fluid in it as Mopar got real picky about which fluid to use. I had plenty of Chrysler automatics whine a little when either low on fluid or needing a band adjustment. That little bit of wear you see with the magnet is nothing - don't sweat it at all. Just did a 32RH in a 96 van that would whine and slip a little when starting off on a hill. Band adjustment fixed it.

The page below (when it loads...) may have the specs you need...
http://arrc.epnet.com/autoapp/9107/9107CH07_ADJUSTMENTS.htm