The other day I was sitting at a drive thru waiting to order, with the truck in drive and stopped I could hear a knocking sound coming from the bottom of the truck, tranny area. I took the truck out of drive, into park and the sound went away? I am curious if anyone has any suggestions as to my problem and or any corrective actions I should take. I need to do my tranny fluid, so I am debating spending the money on new fluid before I figure out the problem if the tranny needs to come out. Truck is a 2003, tranny was changed by chrysler at 120K, the unit has 60,000km on it now. Yet another tranny issue with a chrysler product!!!!!!!!