Dodge Repair: 1998 Dodge durango rear expansion valve replacement, refrigerant system, refrigerant lines

Question
I bought the new rear expansion valve on line. The Dealer told me that the rear expansion valve was leaking and it would be 400.00-500.00 dollars to repair. I will also buy 4 new o-rings for the attached lines. Where is the rear expansion valve located? Is it in the roof or under the car? Do I need a special tool to break the lines?

Answer
REAR
WARNING: REVIEW THE WARNINGS AND CAUTIONS IN THE GENERAL INFORMATION SECTION NEAR THE FRONT OF THIS GROUP BEFORE PERFORMING THE FOLLOWING OPERATION.

REMOVAL
1.Disconnect and isolate the battery negative cable.
2.Recover the refrigerant from the refrigerant system. See Refrigerant Recovery in the Service Procedures section of this group.
3.Remove the engine air filter housing. Refer to Fuel System for the procedures.
4.Remove the underbody line. See Underbody Refrigerant Line in the Removal and Installation section of this group for the procedures. Remove the line from the vehicle and install plugs in, or tape over, all of the open refrigerant fittings.
5.Disassemble the bolt (M6) from the forward (longer) section of the underbody lines to the valve. Install plugs in, or tape over the open refrigerant fittings
6.Disassemble the two bolts attaching the expansion valve to the rearward (shorter) section of the underbody lines. Install plugs in, or tape over the open refrigerant fittings.
INSTALLATION
1.Remove the tape or plugs from expansion valve and the rearward (shorter) section of the underbody lines. Align the expansion valve ports with the block fitting on the rearward lines and assemble with the two bolts.
2.Remove the tape or plugs from the forward (longer) section of the underbody lines. Align the expansion valve ports and stud with the block fitting on the forward lines. Secure with the mounting bolt.
3.Install the underbody refrigerant lines. See Underbody Refrigerant Line in the Removal and Installation section of this group.
4.Install the engine air filter housing. Refer to Fuel System for the procedures.
5.Evacuate and charge the refrigerant system. See Refrigerant System Evacuate in the Service Procedures section of this group.
6.Connect the battery negative cable.