baddabing wrote:
I wish it was the rubber o-ring...I remember pulling the old one off, it was stuck to the filter head. Too bad it wasn't something simple like that

Well it just might be a rubber "O" ring but on one of the plastic disconnects back near the tank instead of the at the filter

While putting the intank pump on my 06 I discovered how little presure it took to connect the fittings. Early in the life of the CRD's some dealers actually recognized and fixed the air in fuel problem by replacing the fuel lines to the rear
To put a intank pump on you need to drop the tank, remove the original metal float arm and install it on the new pump. Then carefully snip off half of the locating tab that's in a different place on the new pump so it will orientate properly. You'll need a total of three pins, two for connecting to the pump and one for the connector under the back seat. You need to move the left rear seat so you can get to the plug underneath the carpet. Under the seat insert one connector pin in the connector and attatch the ground wire to the nearby bolt. You can fish/work these two wires through the harness without removing it. The controling circuit, relay and fuse along with wiring to the underside of the back seat are already there waiting
If your good it's only about two hours. The hardest part for me was getting the back seat out. You also want the fuel level to be down low. I have a hitch installed that covers the 2 rear hanger bolts and found it only necessary to remove the front bolts on the 2 straps then moved them out of the way.
I did mine in 2 steps over two days. Step one put in the wiring and leave then coiled up under the jeep. Next day I dropped the tank and put the pump in. Several have found the original big green "O" ring can be compressed better then the new one that comes with the pump.
There are install threads in the Tech section. Getting the three pins is the first order of business. As I recall there is not a direct harness available so you'll need to solder and tape/heat shrink them well.
Pump was around $150 with shipping on line