The bracket that connects the transfer case to the floor 4wd selector seems to fall off, come loose and/or break off randomly. Not sure what the original factor bracket that connects these two looks like exactly but this is the second time it's missing and gone, thus leading to the floor 4wd shifter just flopping around. So if you have a 03-07 2500 and have the 4wd floor shift/manual selector, this fix might be for you. I looked on other sites but rely on DTR for lots of ideas, fixes and tips and wasn't able to find anything. So with this write up I found some of the parts ideas on other sites and hopefully these details help.
Sourced parts from McMaster-Carr (super fast to ship)
(2) 3/8 ball-joints RH thread
(1) 3/8 Internally threaded connecting rod- 9" length
(4) flat fender washers
(2) locking nuts
Measure distance to confirm the length from the shifter to transfer case connection points. I had to cut/trim both ball-joints and the connecting rod about 1/2" each for approximate best fit. I used a small piece of hose as internal grommet for the connection points of both the floor selector and the transfer case




. Test fit, adjust to the correct length for actual 4wd engagement. I needed to adjust the length about 1/4" but when tested 4wd engages and now works again.
Pretty easy overall vs buying the same factory part to have it fall off again. Cost was about $53 and an hour or so to cut the