As far as I know any AOD will work. You shouldn't have problem finding a good used one, but depending on your budget, a rebuilt one has alot more piece of mind. When you said it shifts different after the filter change, do you mean a lazy shift with some slip, or after the shift it slips when in gear. Or very erratic shift points, like it has a shift kit?
Just another idea, make sure the TV cable is still attached to the throttle linkage. That cable determines shift points for the tranny. You'll smoke an AOD rather quick if that's not connected or adjusted right.
Last edited by 88 orangepeel notch; 02-13-2014 at 02:19 PM.