Okay, here's what the little beasty (TCCM) looks like out of my '01 Durango. This is the side facing the steering column. The heat sink is aft of the firewall. The 3 hexhead philips screws that need to be removed are the TR, BR and BL holes. The top right (TR) is the bitch to remove. You need a 7mm wrench and will need to use the open end. Remove this screw first because the other screws will hold the module tight allowing you to remove the tough screw easier. I would also recommend doing the reverse on reinstall. Get the easiest (bottom) screw in first and tighten it fully. Then you can adjust the position of the module so the other holes line up and it will be stiff enough to stay in postion.
This is the other side where the 3 connectors snap in.
Here's the part#'s on the one I pulled out. The P56028242AF and the 242AF were the numbers that were the same as the one I put in except the one I put in (from an '01 also) ended with an AD instead of AF. Nonetheless, it worked fine and immediately once I had it connected. I would make sure that you snap in the connectors and check that the new-used one lights up your selector switch LED's and you can hear the transfer case engaging and disengaging when you switch between 2WD, 4WD and 4Lo before you go through the arduous task of trying to jostle that puppy back into its usual spot. This is not an easy task but I can assure you that you do not need to remove any more of the dash than the one piece under the steering column. Just keep fighting with the sumbich until it fits in. I found I had to use firm pressure getting it in and out and it gets scraped up a bit on the metal bracket.
I popped the little beggar open to look for any obvious fixable problems but it looked absolutely mint.
Stealership cost in Canada was $545. I tracked a used one down and they wanted $350!! Yes, $350!! I told them there was no way I'd pay .75cents on the dollar for a used, unwarranted electronic part that could go at any moment like mine did. They said it came from a vehicle that only had 160km on it. I explained how warm and fuzzy that made me feel since mine had only 123km on it when it went. Kept checking and found another for $95. Fair enough.
Sorry, didn't confirm the model years or whether this part could come out of a Dakota also. Maybe someone else can answer that.
Good luck with your repair.