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  #13  
Old 03-26-2012, 07:22 AM
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Re: Quadra-Drive II

It is a well known fact that a very good percentage of QDII diffs whine, even when new, as the tolerances with each are all slightly different, and the QC is frankly poor during the diff assembly. IF buying a JEep with QDII, new or used, make sure to test it out at all speed, and under load (uphill and downhillO. If any whines are present, move on. WHen I bought my OVerland, I test drove 3 WK's, all new. One whined badly from the front at 60 mph, and had 20 miles on the OD.
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  #14  
Old 03-28-2012, 04:41 PM
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Re: Quadra-Drive II

My '06 has whined at 60mph on unload since day one. Dealer threw parts at it when it was under warranty, sometime making it worse, actually. But now I turn the stereo up. Hasn't got any worse.
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  #15  
Old 03-29-2012, 01:37 PM
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Re: Quadra-Drive II

I just drove 900 miles roundtrip the past 2 days and wouldn't you know it, the rear diff is making noises on my QDII now. Low pitched like bearings going south. My extended warrantee expired a couple of months ago, now with 75k on the OD. I took it to the dealer I bought it new from, and who did all diff service since day 1. They said it is out of warranty so $120 to diagnose the problem. I then asked to talk with the service manager and he said the same thing. I just said loudly, that is ridiculous as it will take 2 minutes total to test drive it and hear the noises, and the only other thing you can do is check the fluid level, which I already did and is fine.
THey finally agreed to waive the charge and test drove it, checked the fluid. The result is an estimate for $1,300 to repair the rear QDII diff. I have never had any diff fail in over 40 years of owning dozens of cars, no matter what the mileage, so I asked for the number of Chrysler Relations, called them, and opened a case this morning. They reviewed the case, called the dealer, and just called me back. For a $100 deductable, they will do the repairs, parts and labor. with 12 month warranty. This is only since I had the extended warrantee and dealer had records of doing the diff service on time. If I did not have this and they had not agreed to pay the cost, I was going to dump the vehicle, as it has by far been the most problematic vehicle I have owned in 40 yrs, and is now out of warranty. If they don't do fix right, it goes back again until it is right, or replace the diff with a new one.
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  #16  
Old 03-29-2012, 03:45 PM
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Re: Quadra-Drive II

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Originally Posted by dmsfun View Post
I just drove 900 miles roundtrip the past 2 days and wouldn't you know it, the rear diff is making noises on my QDII now. Low pitched like bearings going south. My extended warrantee expired a couple of months ago, now with 75k on the OD. I took it to the dealer I bought it new from, and who did all diff service since day 1. They said it is out of warranty so $120 to diagnose the problem. I then asked to talk with the service manager and he said the same thing. I just said loudly, that is ridiculous as it will take 2 minutes total to test drive it and hear the noises, and the only other thing you can do is check the fluid level, which I already did and is fine.
THey finally agreed to waive the charge and test drove it, checked the fluid. The result is an estimate for $1,300 to repair the rear QDII diff. I have never had any diff fail in over 40 years of owning dozens of cars, no matter what the mileage, so I asked for the number of Chrysler Relations, called them, and opened a case this morning. They reviewed the case, called the dealer, and just called me back. For a $100 deductable, they will do the repairs, parts and labor. with 12 month warranty. This is only since I had the extended warrantee and dealer had records of doing the diff service on time. If I did not have this and they had not agreed to pay the cost, I was going to dump the vehicle, as it has by far been the most problematic vehicle I have owned in 40 yrs, and is now out of warranty. If they don't do fix right, it goes back again until it is right, or replace the diff with a new one.
Glad you got things taken care of and Chrysler was willing to cover the majority of the repair. Hopefully they can fix it right!
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  #17  
Old 03-29-2012, 04:03 PM
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Re: Quadra-Drive II

Yes, I was surprised how quicly they approved of this and am also hoping they can fix it properly. I've had worse experiences with Ford and Mitsubishi not standing behind their problems. This dealer is a 4 star dealer, and the service has always been good so far. I talked directly with the mechanic who will do the rebuild, and he has done them and knows his stuff. IF they dont have the shims in stock to set the tolerances exactly, he will order the right ones and not just use the old ones.
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  #18  
Old 03-29-2012, 04:12 PM
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Re: Quadra-Drive II

I enjoyed 70K whine-free miles out of my 05 with QD-II before I traded it in. Changed the fluid every 15-20K miles.
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  #19  
Old 03-30-2012, 11:18 PM
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Re: Quadra-Drive II

My 07 developed a front whine when the breather got ripped off in mud. The pinion bearing started out lightly, then enough to keep under 80kph .

Local diff shop was able to repair for couple of hundred bucks, no more whine.

Mines done over 30k of hard offroad and still in good nick and locking well.

Dave
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  #20  
Old 03-31-2012, 10:15 AM
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Re: Quadra-Drive II

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Originally Posted by dr.lee.baugh View Post
Finally, you can get out and do some offroading - if you get stuck, you don't have Quadra-Drive II
Bologna! My QTII has got me everywhere that the locked cherokees i go out with have gone, less 1 section of trail I didnt even attempt due large rocks that took paint off of every rig that went through. sure they were further from the limits of their rigs than I was... At the end of the day lsd's are better than none but they will still slip when given enough torque split and enough torque split is when you clearly need it the most.

Quote:
Originally Posted by dmsfun View Post
QDII is great, but not for long term ownership The diff's will whine and when they do, it only gets worse with time. Jeep stopped using Dana axles in 2004 and the QDII are not rebuildable by replacing worn parts, they must be totally remanufactured, which is VERY costly, i.e., both plus labor is 4-5 grand. Setting the bearings requires very thick shims, a special tool, and a selection of nearly 100 different thicknesses as each one remanufactured will be different, and no rebuild shops even carry the selection. It is time to trade it when the whining gets bad in other words.
Bologna! This is very much so a rebuildable front end, and other than needing a heavy duty snap ring tool and a case spreader (both of which should be on the shelf at any dealership), there are no shims to set backlash (yes for pinion depth) it uses a selectable snap ring (what you need the HD snap ring tool for) there is nothing special about this front end. Furthermore the whine isnt QDII specific, any differential can and will eventually make noise.
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  #21  
Old 03-31-2012, 04:27 PM
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Re: Quadra-Drive II

The intent to was not to slight the QTII guys, it was just a joke ! From what I've heard from other owners and seen on the trails, I certainly wouldn't worry too much about getting stuck with either system...not to mention that 95% of these beasts never make it on the trail anyawy!

As far as durability/reliability I can only speak for myself - with close to 175,000 miles, no whine, no issues in either diff (fingers crossed!)
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  #22  
Old 04-01-2012, 02:46 AM
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Quote:
Originally Posted by dr.lee.baugh View Post
The intent to was not to slight the QTII guys, it was just a joke ! From what I've heard from other owners and seen on the trails, I certainly wouldn't worry too much about getting stuck with either system...not to mention that 95% of these beasts never make it on the trail anyawy!

As far as durability/reliability I can only speak for myself - with close to 175,000 miles, no whine, no issues in either diff (fingers crossed!)
I know... Its all good!

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  #23  
Old 04-10-2012, 07:12 PM
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Re: Quadra-Drive II

So the dealer just finished the repairs on my QDII rear diff., replaced front and rear pinion and carrier bearings and races, and a list of other parts. The bearings and races were all toast at just 75k, and all maintenence was done according to schedule, by the dealer. I've never had any diff go bad in any vehicle until this; Chrylser crappy quality again... They had the right shims in stock, and it is nice and quiet now, after making noises for the last 10k or more; they paid for the parts and labor costs, which would have been $1300.
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  #24  
Old 04-18-2012, 08:42 AM
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Re: Quadra-Drive II

redline in my diffs and they seem Super happy
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