good luck and report back the results.
be sure to disconnect the negative before messing with anything electrical.
now I have a module that could work and I can let it go for like a hundo. issue is I dont have the part number. It is brand new. I have the module and I have the packing slip but nothing shows the part number. its def a NAG1 (3.7 or SRT8) as it dont have the lo-range switch.
if it turns out you need one, we should see if this is what you need. maybe save some coin.
but really, maybe the cleaning will work
one more thing: here is a link to a "how-to" remove the shift module: http://jeepgarage.org/showthread.php?t=8305