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I swapped my 199 AG FDCM with a used Non-Updated 199AH FDCM that was also from a 2005 Jeep Grand Cherokee Limited 5.7L with Quadra-Drive II.
As the video shows with no cuts or edits (so sorry for having to put the camera down) that this does solve our 4LO issue. Now I have a roll away issue but I have always used the parking brake and I don't have remote start.
However we are still loosing because as the word gets out about this issue our Jeeps loose value. I was considering a new Dodge Ram 1500 with the eco-Diesel but instead I started to look at F150's with the Eco-Boost. Sorry Chrysler you let me down and others down and this vehicle is hardly "Trail rated" with the N23 recall done.
It's not the Actuator, It's not the FDCM, it's not the transfer case. It's YOUR software update. 250,000 JGC's sold and what a small handful had roll away issues because the people did not take due care and use parking brakes like they should have!!! I'm not sure how such a small number equals a "safety hazard or concern" to even issue a RECALL.
The more I think about it, Chrysler took the cheap route, the cheap fix and knew that 4LO would be affected and they know most would not even realize this. A more pressing concern I have is I don't believe my TCS works properly with the N23 recall done, which is a much bigger safety issue. Also 4LO to me is a HUGE safety issue because I live in a State where mountain trails are impassable without 4LO. I bought my Jeep Grand Cherokee as a toy, as a way to explore the back country with my wife and child. I am thankful I found out my 4LO does not work before getting in a serious predicament.
Imagine getting to aan out of the way area. The trail goes down hill some very rough terrain and one doe snot NEED 4LO yet to go down. So they get down and then it sorta smooths out and they travel for a bit and come to an uphill that you need 4LO. You go to put it into 4LO and you get that message 'Service 4WD System'. Now you are stuck you need it to continue on, and you need it to get back out.
You have your wife, and 2 year old with you. You are unable to walk out due to the 2 year old's capabilities.
So your options:
1) Stay and hope someone comes
2) Leave wife & child and hike out to get help
Depending on the time of the year hiking out might not be an option due to very cold temperatures at night even if the day is okay.
This vehicle was "Trail Rated", I have a feeling any loyalty you had from people will be gone and they will be looking at other Manufactures.
If this was an underlying issue that your update brought about as you claimed then unknown to me due to poor manufacturing/design that is not the fault of myself then you ripped me off when I purchased this 2WD vehicle as I paid probably $5,000 to $8,000 too much.