Well I hope the Millions and Dollars of R&D helps explain why my diff locked up. I definetly do not believe that changing the diff that was performed by the dealer was the problem. I want those R&D dollars to report if there is some kind of flaw or defect in the powertrain.
Remember, in my first post I stated the PCM module fried. That caused my transmission to lockup and I was driving in a residential area at 40 mph and was not able to move. Again, I have no confidence in chrysler and their products!!!!

 

Yep, I was in no way trying to say you did anything wrong - just that it would raise suspicion. Changing it at 20k when the axle manufacturer's specs say 30k with hard use probably wouldn't cause someone to raise an eyebrow, but at 10k AND 20k - yeah, I'd at least question it.

Very few are more **** than I am about maintenance. I do most right at the shortest scheduled intervals. I do my rear axle every 15k and front at 30k and I've been questioned why the rear gets done twice as often. In my case I have a valid reason - I have a 3rd party LSD which specs NO synthetic lube may be used. So I use conventional in the rear axle twice as often as I use synthetic in the front.

I'll use a little common sense in other places as well if there are known problems just to avoid them. For example my Jeep has the 4.7 which is known to not handle over-heats well at all. So I flush the coolant and replace at twice the normal interval.

So, like I said, I'm not blaming you for TOO MUCH care, just saying that it'll probably be questioned...

But it's very rare to see an AAM go bye-bye unless it's the POS stock LSD that caused it to fail. I'm curious to know exactly what happened...

 

is your diff a 3.55 or the 3.92 LSD? this part seems to have been skipped.....

if you have the 3.92's did the dealer add in the friction modifier into your diff? if it "slipped" his mind then yes it could've been there fault.

 

On post #16 I stated that my diff is a 3.55.

 

^ my bad, that's what I get from reading from the browser on my phone!

 

Yeah my diff also went and it was a 3.55. But unlike you I never serviced it. Since the dealer did your maintenance then I don't see why it wouldn't be covered. Of all the stories I've heard about blowing diffs, every single one was a 3.55 diff. There's definitely a trend here.. Pos

 

Almost without exception the failed diffs I see or hear about (at least in 3rd Gens) are the ones with the factory LSD - regardless of whether it's a 3.55 or 3.92. I've probably seen more failed 3.92s than 3.55s myself, but only because there is a good bit higher percentage of 3.92s with LSD than 3.55s.

Regardless, it's drivetrain, should be covered no question unless there is a definite sign of abuse.

PCM I can understand, it's a damn electrical component and basically a computer and electronic components can just fail - at any time - without warning. Unplug the part, plug a new one in - no biggie.
But to have your driveshaft basically drop out on the road - yeah I'd start to have my doubts about the vehicle...

 

I was referring to all the 4th gens I heard of blowing a diff was in the 3.55 open diffs, is it normal for them to go at low mileage, definitely not, just junk and that's the same for everyday products, hard to find good stuff that's heavy duty.

 

Now the interesting thing would be to know if they were AAM or the vendor Chrysler changed to after?

 

Not confirmed, but I have heard there were some rear diffs with the fill hole too low. Not sure if this is true or not, but mine went at 24,000k and they replaced the whole rear end, not just the gears.