My neighbor has a 2002 Durango with the the two-zone AC system. I recharged the system with R134a the other day. He has great cold air blowing out of the rear seat AC vent system. Only warm air (almost cooled) blows out of the front. Are there two filler ports in his car? One for front area and one for the back seats?

 

https://dodgeforum.com/forum/dodge-d...s-section.html

this should be in the 1st generation section, ill move it there for you.

however, no there is only ONE a/c system on these trucks, however i would think that there is one of two issues, 1 not enough freon made it into the system, or 2 the blend door is not closing to seal off the heater box