My 04 3500 SLT 5.9L, has had a issue for some time.. This was my Dads truck and it use to not register in Park on the dash.. He Mentioned something about having the shift cone replaced. It fixed the "P" indicator problem but it has a issue with "D" and "2".. so when shifted to "D" it will hop down to "2" on its own and cause the trans to down shift and sometimes it hops back n forth.. So in order to drive in "D" I actually have to bump/Tap the shifter up a bit until the "D" is no longer highlighted. This causes the transmission to actually stay in "D" and not hop between "D" and "2".. Has anyone else ever had this issue? I think this trans has been built, it has a Smarty/Edge tuner..