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-   -   Well this is a new issue... (http://www.jeepgarage.org/f162/well-this-is-a-new-issue-53959.html)

JEEPYOU 01-31-2013 11:23 AM

Well this is a new issue...
 
TCase decided to pop a hole in itself and here is the crazy part, no noise, still moved under her own power, not sure what to think! :(
http://i148.photobucket.com/albums/s...pscde72929.jpg
http://i148.photobucket.com/albums/s...ps90c3f6c4.jpg
Spoke to Team SRT last Friday morning, case number assigned and I got it towed into the the dealer later that day.

A little back story on how I found out about this...

Neighbor knocked on my door and said there was a puddle of oil under the Jeep. I had gotten home maybe 10 minutes prior and there was nothing that led me to believe anything was wrong. I thought maybe the oil filter leak that so many had spoken of somehow started with mine. As soon as I walked out and saw the trail up the driveway and the puddle under the Jeep with a reddish tinge of the fluid, I knew tranny or tcase.

I live less than an 1/8 of a mile from an intersection and on the way home, when the light turned green I launched, she got up and moved out like always, no noise, quick spin of the front right that was grabbed by the traction control as always, got up to about 35, let off... braked, turned and backed her in. No indication of anything wrong at all... at a loss as to what would have happened to cause this.

Using my off road Jeep experience, this to me sounds like shock loading of the tcase chain. Not enough to break it, just enough to have is smack the case and cause damage to it. Guess we'll see what they find out.


I must say that Team SRT has been OUTSTANDING in assisting me with this problem. I cannot say enough about how great it is to have them as a resource. Kudos to SRT and Ralph for this service, it is GREATLY APPRECIATED!

I spoke to the service adviser Tuesday morning and my hunch was right. It appears that the chain had enough slack in it to "whip" the bottom of the tcase where it makes the turn around the front output shaft. They have ordered a replacement tcase from Detroit and hope to have it in by weeks end.

Now my concern switches over to something that a few of the high HP guys in WK1's had which was chain slack from launching. A little more power and 500 extra pounds could have an affect on the chain for sure, yet this is the same tcase they are using on the Ram 1500's with the addition of a low range and that rig weighs up to 7000lbs.

I guess only time will tell whether or not this was a freak incident.

Scottina06 01-31-2013 12:10 PM

Re: Well this is a new issue...
 
ugh.....that sucks! So you did a hard launch and then immediately let off the throttle?

JEEPYOU 01-31-2013 12:17 PM

Re: Well this is a new issue...
 
No, floored it... ran it up to about the end of first gear and backed off, not all at once... just enough to have it shift before red line, I'd say about 35 mph.

My guess is that the tcase shock occurred when she spun up the right front for that split second before traction control kicked in and that was enough to load, unload and then reload the tcase chain causing the momentary slack that allowed for the whipping action to take place.

Was dry out, about 55 degrees, 9:45pm.

JEEPYOU 01-31-2013 12:20 PM

Re: Well this is a new issue...
 
One other point, due to having a full docket at the dealer, they decided not to pull the tcase out and apart yet as they had to move the Jeep out of the service bay. It has not been decided if they will split the case after pulling it and replacing with the new one... they might be sending it back to Detroit without doing so.

I for one hope they do split it as I asked that if they do to please give me a call so I can take a look. They seemed to have no problem allowing me to do so.

Scottina06 01-31-2013 12:28 PM

Re: Well this is a new issue...
 
yep...probably had to do with the spinning rf tire. Couldve been a defect in the case casting too in that area. I believe a tad bit of slack is normal.

JEEPYOU 01-31-2013 12:58 PM

Re: Well this is a new issue...
 
In the old NP231 and NP242, there is a small amount of slack that is needed for these to operate normally. I assume the same for the MP3010.

Also, if you look at the second picture... on the leading edge that runs to the left from where the two cracks converge on the tcase, there are what appear to be "ears" for lack of a better term. My mind is telling me that these might be casting related in that the second crack running to the right is a clean one, no "ears".

I am no metallurgist, but something tells me a fracture in a casting caused by blunt force applied by a striking object should cause a clean break. :confused:

JEEPYOU 02-11-2013 02:42 PM

Re: Well this is a new issue...
 
Just a quick update... got her back last Tuesday and all is well! Runs and drives same as before, already put 400 miles on her with no issues.

Been super busy, sorry for not posting sooner. Big thanks to Team SRT for all of the help, they are a great resource to have!!!


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