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09-23-2006, 12:32 AM
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Hummer Guru
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Third Diff's a Charm
I hope so. 
I took my truck in yesterday because I was getting "that" grinding noise in the front end again.
Talked with the service guy a little while ago and its the front diff again. Chipped teeth on the gear. They're going to take pics this time and send them to me.
It broke the first time back in Jan. before they came out with the "new" supposedly hardened gears  so I expected it to go at some point. But I can't really think of any times where it could have happened. Maybe one spot in Moab but that was a month ago.  You'd think I would have noticed it since I'm paranoid about every noise now.
I'm just glad I caught it before the Rubicon trip.
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09-23-2006, 12:41 AM
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Re: Third Diff's a Charm
Sounds like it cant handle the load
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09-23-2006, 12:44 AM
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Re: Third Diff's a Charm
Quote:
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Originally Posted by Sewie
I hope so.
I took my truck in yesterday because I was getting "that" grinding noise in the front end again.
Talked with the service guy a little while ago and its the front diff again. Chipped teeth on the gear. They're going to take pics this time and send them to me.
It broke the first time back in Jan. before they came out with the "new" supposedly hardened gears so I expected it to go at some point. But I can't really think of any times where it could have happened. Maybe one spot in Moab but that was a month ago. You'd think I would have noticed it since I'm paranoid about every noise now.
I'm just glad I caught it before the Rubicon trip. |
What kind of noise?
Was it at the stop or all the time.
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09-23-2006, 12:47 AM
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Hummer Authority
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Re: Third Diff's a Charm
These front diff. problems are disconcerting.  |
09-23-2006, 12:54 AM
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Re: Third Diff's a Charm
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Originally Posted by fourfourto
What kind of noise?
Was it at the stop or all the time.
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Its a grinding noise when you let off the gas and coast. It was really faint this time and could only really be heard if I was going 40MPH+.
Last time it was the same noise, but louder and very obvious.
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09-23-2006, 12:58 AM
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Re: Third Diff's a Charm
Quote:
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Originally Posted by fourfourto
What kind of noise?
Was it at the stop or all the time.
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ROFLOL fourfourto ... you are DEFINITELY getting paranoid now! Just joking .. I do know how you feel. I watched every post here like a hawk trying to figure out what my groan/grind was. You know, f5fstop 'diagnosed' mine from the start. (I always wonder if he gets migraines from all of the questiosn directed to him.  )
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09-23-2006, 01:00 AM
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Hummer Guru
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Re: Third Diff's a Charm
Quote:
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Originally Posted by Sewie
Its a grinding noise when you let off the gas and coast. It was really faint this time and could only really be heard if I was going 40MPH+.
Last time it was the same noise, but louder and very obvious.
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Mine's doing the same thing....it's going in on Monday...  |
09-23-2006, 01:02 AM
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Re: Third Diff's a Charm
You didn't mention if it is being covered under warranty.....is it???
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09-23-2006, 01:04 AM
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Re: Third Diff's a Charm
Is it a continuous grinding sound even when coasting???? Do you have 5-speed manual or automatic?
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09-23-2006, 01:11 AM
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Re: Third Diff's a Charm
It almost sounds like the heat exchangers rattling, but it only happens when coasting, and makes no noise below 30mph.
Mines a bunch louder than it was last week....
DAMMIT!!!
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09-23-2006, 02:23 AM
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Join Date: Jan 2006
Location: Central Florida
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Re: Third Diff's a Charm
It's a MOAB virus...... 
I really do feel for you Sewie and Bebe and HI, they really should get to the bottom of this and do something about it. It seems like you guys/gals who wheel a little more hard core particularly rock crawling are the ones having the most problem. I'm afraid my number is going to be up one of these days..... |
09-23-2006, 02:36 AM
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Re: Third Diff's a Charm
All I can say is, this issue pisses me off more than any other issue GM has at this time. Maybe, and I say maybe, if enough front diffs are replaced, the people who made the decision not to go with the heavier cast iron front diff (vs the aluminum diff) will decide it is best to replace with cast iron diffs as the vehicles come in with broken front ends.
I have grumbled, argued and made slide remarks to certain people in regard to this issue and all I get are cold stares. I have tried different approaches such as make the stronger diff part of the adventure package for a hundred more.
l'm at a loss as to what to do.
I can say that I have heard the stronger gear set should help, but will it help for those who climb in the Moab area or the Rubicon. Sure it will help quite a few who just off-road on severe roads such as the ones I ran in Moab. But for those who are out climbing the escalator, golden spike, etc.?
All I can say is I can see no way, someone could refuse warranty on the front diff if it was destroyed off-roading. Hummer advertises this fact on their own website, and I cannot believe any arbitrator would rule in favor of GM/Hummer on this issue.
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09-23-2006, 02:47 AM
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Re: Third Diff's a Charm
I'll just continue my quest for the cast iron housing.
Problem is, they were fine in Moab and on the Rubicon. We did not break anything, to the point of failure.
Sewie, HI and I, had our initial R&P's changed before they decided to increase the hardness of the R&P. So we probably have old defective stock.
However,
I'm thinking that once the housing flexed enough to break the gear, it could be permanently out of shape?
Maybe replacing the the R&P AND the Housing could be the ticket?
If they base thier decisions solely on beans, I would be surprised. It could be that some obscure engineer is defending HIS decision to use aluminum.
Whatever......
They need to get it figured out before my warranty is up.
And Sewie, see if you can get them to change the housing too. |
09-23-2006, 04:58 AM
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Re: Third Diff's a Charm
Sorry to hear this and hope that is gets taken care of correctly this time. As Bebe said, not sure that just hardened gears is the fix but sure hope the come up with something soon
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09-23-2006, 07:53 AM
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Hummer Veteran
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Re: Third Diff's a Charm
Quote:
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Originally Posted by HummBebe
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I've noticed like a gear whining noise when decelerating too. More now than when it was new. Let me know what they say. I'm always looking for an excuse to go see Dina and Tina.  |
09-23-2006, 07:59 AM
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Hummer Guru
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Re: Third Diff's a Charm
Quote:
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Originally Posted by HummBebe
You didn't mention if it is being covered under warranty.....is it???
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I haven't heard otherwise.
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09-25-2006, 03:21 PM
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Re: Third Diff's a Charm
Quote:
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Originally Posted by BlueHUMMERH2
These front diff. problems are disconcerting. |
all the trucks with these problems are getting wheeled harder every month than most H3's will get wheeled in its life time
yes the front diff could be beefier or atleast equal to the rear . hopefully this will be resolved by 08-09 model year , the first couple years of H2 had similar troubles . if my second one comes apart i will let them replace it again
Sewie , Bummer are you and HI in a competition ????? You gonna be back together for the Rubi ?? , good luck
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09-25-2006, 03:29 PM
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Re: Third Diff's a Charm
i think the answer is under the front of my 90 Z71 ,  Cast Iron 
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09-25-2006, 05:01 PM
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Re: Third Diff's a Charm
Quote:
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Originally Posted by NEOCON1
hopefully this will be resolved by 08-09 model year
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Yes and no...(I know, I'm a smart ass, but really can't say here yes or no)
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09-25-2006, 05:10 PM
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Re: Third Diff's a Charm
Quote:
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Originally Posted by f5fstop
Yes and no...(I know, I'm a smart ass, but really can't say here yes or no) |
oh oh , sounds like they are more concerned with engine upgrades than a bullet proof front diff . hope they dont plan on this being the front for the V8 we would see lots more ( i think ) fail in the real world .
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