Remove the antenna cap nut using an antenna nut wrench (Special Tool C-4816) or suitable tool.
Remove the antenna adapter from the top of the fender.
Lower the antenna body and cable assembly through the top of the fender.
Pull the antenna body and cable out through the opening between the right cowl side outer panel and the top of the fender, while feeding the antenna coaxial cable out of the engine compartment through the hole in the right cowl side reinforcement.
Remove the antenna body and cable from the vehicle.
Reverse the removal procedures to install. Tighten the antenna cap nut to 8 N.m (70 in. lbs.) . Tighten the antenna mast to 3.3 N.m (30 in. lbs.) .
I usually tighten by feel....snug....Just don't overtighten the Antenna Mast, because the Stud can twist & break.You may be able to use your old Nut & Adapter (top part) & just get the Base & Lead #5604301AB
Dodge Part # Antenna Mast = 56007361
Antenna Base = Nut 56006828, Adapter 56043018, Base & Lead 56043019AB
I usually go to my Local Dodge dealer, but you may be able to find on-line