Here is the NP241DHD transfer case.  The R&R for the LD transfer case should be very similar. Here is the Parts Blow-out for the NP241DHD You can find any of the part numbers for the transfer case using the part number lookup tool.  The link below will take you to the transfer case section for a 2nd gen Dodge Ram Truck.   https://mopar1973man.com/external-media/pdf/2000Ra