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Discussion Starter #1
Anyone out there have a 2002 ZQ8 Sonoma that DOESN'T vibrate from the rear? Anyone actually get GM or dealer to remedy? If so, what was the trick? GM engineering is blowing me off. "Within spec" they say. Drink some milk, swallow some ice cream, drive 55-60 MPH and make your own #$%$#@! milkshake!!

N. J.
 

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Primer Spots
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take this over to the tranny/rearend forum I've been trying to find out anything that will remedy the problem, its in the newer threads. Still no luck and mine just got alot worse with a 3 in drop out back.
 

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my 01 ZQ8 does that too, but not very often, only on some roads
 

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N J when you lowered it, did you use the proper wedges so that the propellar shaft (drive shaft) is still within the "working angle" limits?
 

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Discussion Starter #6
jochumr-
When I lowered it? I haven't touched the #$%$#@g thing. It vibrated from delivery through the first 400 miles and into the additional 139 the dealer has put on it trying to eliminate the problem. When I took delivery the tires looked like they had a four-day beard. I thought maybe all the little barbs were creating the problem...like when you get up into the marbles on the track, but no such luck.

It's been in the shop for a month this Friday 5/24. The service write up says the two-piece driveshaft has this inherent problem and it is unrepairable. Notwithstanding that, the dealer's sevice dep't. has been trying to work with GM Engineering. They've been hiding behind the phone, refusing to accept meaningful vibration measurements and insisting the Service Tech take readings where he can't get good data.

So now I have a vehicle with known, undisclosed, unrepairable defect. Can you say "lemon" boys and girls?

The GM regional service rep. is supposed to be back from vacation on Tuesday. If he doesn't offer to buy it back in full, I'm off to a Lemon Law lawyer.
 

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NJ

Sorry, I was thinking you lowered it when infact it was mrshaft696. Not sure how GA works but you need to have all your documentation, and conversations with the service peoples straight.
Start a journal now and document everything you have done and said to the best of your ability. Its been my experience in life that if you stick to the facts and leave the aditude at home, you will get further. I owned a T-bird that had a defective tranny, that the slaes people knew about. They had the car for over 45 days. When I was done, the dealership was in deep sh*t with Detroit and I had a new tranny.

GM regional service rep is the guy who will get the job done for you, that's why you need to have your documentation.

Good luck ....
 

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Primer Spots
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Hey NJ let me know how it goes, if you can give me a numer and a email addres to anyone at GM that knows about the problem I'd be glad to input on the poblem, and to jochumr mine vibrated from day one, now its just worse. I have taken mine in before for this so let me know what happens, keep us posted.
 

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Discussion Starter #9
Jochumr- That's exactly the way I'm going. I've kept the lid on while telling them how frustrating it is and telling them I'm trying to be reasonable. Their response so far is quiet, appreciative, and now, non-responsive. They say that I'm handling this in the best way and they appreciate how I haven't "gone off" on them.

I have a two-page chronology with all the quotes from the Manager and Service Tech. I have written down the $$ numbers to back up my claim for how much I'm out. The Regional Rep. is supposed to be a decent guy, unlike the clowns in Flint that won't accept meaningful data, only that which backs up their position. We'll see.

The bottom line is that I'll keep it bottled up unless they try to shaft me.

The killer is that I have a long history w/ GM: '68 Camaro,'70 Opel GT (don't ask), '73 & '74 Vegas (I said don't ask), '78 Chevette, '81 Citation X-11, '8? Geo Spectrum (Mom's), a '94 Z-28 and a '99 Prizm LSI. The Chevette, the '73 Vega and the Citation are the only ones that I didn't have problems with. There was a time when, if you cut me, I bled little blue bow ties. No more.

You see, spinkled in there are three Nissan Maximas, a '90 300ZX, a '99 Sentra 200SX SE-R (son's) and a '92 hardbody pickup. One messed up sunroof replaced under warranty and replaced a second time for 1/2 price @60K miles. Nothing else, zero, zip, nada. I've been spoiled.

Mrshaft, I'll let you know how it works out for this transplanted cheesesteak-eating Flyers fan. Stay tuned.
 

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Discussion Starter #10
Oh, yeah, I forgot. The rental truck they provided for a while was a full-on Ford 150XLT Quad cab with a V-8!

Truckus Maximus!

The Service Writer asked me if it vibrated. (N.Y. humor). I told him trying to accomodate me with a competitor's truck was a flawed strategy and now I know where to look for a replacement. Sorry guys.
 

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Discussion Starter #12
Pony- Yup. You got it. How the heck do you stand that? This was to be a tow vehicle for my Austin Mini over long distances, but that vibration for 6-7 hours would be unbearable.

My guess is that it's cheaper for GM to ignore/swat down the complaints one-by one than to stop buliding them or declare a recall (assuming they even know how to fix it). It's the late 90's Suburbanitus all over again. As I told the dealer, I looked all over the brochure for some warning....nothing. For example, in the current S-10 brochure they warn that the X isn't designed or recommended for towing. Something that simple in the Sonoma brochure, or a word to the wise from the Sales staff would have been fine. Had that been the case, this whole mess would be on me, you know?
As noted previously, the dealer service staff have been great. I can't say enough about their efforts trying to make it right, but it's a sow's ear.
 

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hey NJ I'm takin it back to the dealer this week and gonna see what they have to say again this time. I dont know if it doesnt work im gonna try some shims or go to 2 inch blocks. damn this is annoying.
 

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mine is only a secondary vehicle ;) that is why i can stand it... if it was a primary mode of transportation i'd prolly become an alcoholic...
 

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Trick MotorSports!
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well, I've got an O2 ZQ8 and the only vibrations I get from the rear is wheel hop from a launch.:beer:
 

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Discussion Starter #17
J-rod-
Boy would I love to have that problem! Mine starts at about 25-30 and gets progressively worse as you speed up. It's worst at 45 and again at about 57MPH.

The regional rep made all the right noises today. He agrees it's there and says he's going against Engineering and after the driveshaft. I told him of a co-worker who's problem was solved by replacing the driveshaft and the posts here about same and pinion angle less than -4º. He asked for one more shot at it, and if they can't solve it through the driveshaft, he'll put me in another truck. There is a driveline specialist in the area with a dynomometer... the whole works, with a good rep. They're sending it over to him. Light a candle for me.
 

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sh*t man let me know what goes down Im goin in on friday about the problem, so we will see what they say
 

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whats new

Well had the sonoma at the dealer again today for the vibration, no dice, no fix, the tech told me that the drive shaft is out of wack, it looks like a small V how it sags in the middle where the two pieces of the shaft join together. I called Belltech and AIM and they both recommended a 1 or 2 degree shim, so Im gonna try that and if it doesnt work im gonna kill everyone!
 

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my sonoma doesnt do it anymore, but i think it just may have been the roads i was driving on
 
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