I did the 03-04 Durango conversion and when I bled the brakes I noticed very little fluid comes through the rear. To make sure I didn't mess things up I took it to a brake shop and had them bleed them. While I was there I asked the guy if the bias for the rear drums is in the ABS valve for the rear anti-lock. He said yes, and I asked if I was to change it for the Durango ABS valve for rear disks if it would send more fluid to the rear and allow for the rear to work more. He said yes again. I would like to change the valve but I have no clue if the computer will notice the different valve and though a code and screw things up. So if anyone knows the answer please let me know.