Concerning the rear differential sensor, if you research enough here (and dakota-durango.com) you will probably even find what size wrench to use along with other tips.
I don't exactly remember how much the part costs since I was buying other parts at the same time. It could have been more than the rebuild of the CAB module which I would expect to be more suspect based on your running pump.
The changing of the sensor itself was easy just make sure you don't force it trying to get the old one out, or putting the new one in. Easier said than done. After reading everyone's experience I just knew something would go south on me so I "micro-wiggled" it out, then same with the new one going in.
If the new one doesn't seat exactly, it was mentioned to turn the wheel a little and try it again. Make sure what you take out looks like the new one so you know part of it didn't stay inside the case. It doesn't take long if you choose to change it. I just crawled under there and didn't even need to lift the truck.
Let us know...
Last edited by DurangoILNG23; 03-31-2009 at 02:05 AM.