I did include this post in my introduction, so apologies if that's frowned upon. The reason I'm being so pushy is because I'm set to buy the Jeep today and want to make sure what I'm describing isn't an issue.
I've had my eye on a 2008 XK with Quadra-Trac II. I insisted the salesman get the mud and muck washed off the bottom and then bring it up on a lift so I could check for issues. Stuff like excessive rust, driveline play, leaks and stuff like that. Anyway, while I was checking the rear differential pinion for slop, I rotated the rear driveshaft by hand and to my surprise, it moved and so did the wheels. I assume the tech put it on park before raising it up, so I was a little confused. After looking it up, it appears Quadra-Trac II has the NV245, which functions as an open differential that can electronically lock up a clutch in case of slippage. Further, both the front and rear differentials are open and use brake distribution to behave like LSDs. I think this explains why I was able to freely rotate the rear driveshaft in park, granted with some effort. It seems this is behavior that's been confirmed on full time 4x4 Durangos on forums. My understanding is that this is because the transfer case is behind the transmission where the parking pawl is.
That, or I'm capable of producing 500hp with my arms. I'm thinking of buying this one, but the OCD side of me won't let go of the possibility that I damaged something. Can anyone weigh in and set my mind at ease? Any help or insight is greatly appreciate, thanks!
It does have the NV245 transfer case - which is the same transfer case that Quadra-Drive II Commanders use - the only difference is Quadra-Drive II Commanders also have Electronic limited slip differentials - Quadra-Trac II Commanders do not.
If you test drive it make sure you can shift into and out of 4-LOW without receiving any Service 4WD System messages in the EVIC
- that should tell you all you need to know.
Also read this thread:
It was also a VERY good idea to get the salesman to wash all the mud and muck off the bottom - and definitely inspect underneath thoroughly for any rust, leaks or signs of impact damage.
I'd also give the headliner a thorough visual inspection around the front Driver's side & front Passenger's side door and the headliner around the sunroof/s as Commanders are pretty notorious for water leaks - from either clogged sunroof drains; bad door seals - or doors that are out of alignment.
Check and see if it has a good service history and the previous owner/s have kept up on all of the maintenance.
The only other thing I'd recommend is to go to the website URL below and plug in the VIN to see if all the factory re-calls and campaigns have been completed:
Safety Recall Information | MOPAR
If the are any that are outstanding - and this XK you are looking at is for sale at a dealership - you can either get the dealership to have the recalls/campaigns completed before you pull the trigger and buy it (which is what I would do) or you could use the outstanding recalls/campaigns as a bargaining chip, to try and chew him down on the asking price.
The difference between a safety recall and a campaign is that a safety recall pertains to a vehicle problem that is a safety concern;
A campaign is a vehicle problem that is not a safety concern, but, pertains to customer satisfaction.
I hope this helps you, good luck and keep us posted.