The BMW UUC Digest 
Volume 3 : Issue 138 : "text" Format

Messages in this Issue:
  Re: <OT> Suburban Tow Beast Help
  Re: <OT> Suburban Tow Beast Help
  Re: <OT> Suburban Tow Beast Help
  Re: <OT> Suburban Tow Beast Help
  Re: <OT> Suburban Tow Beast Help

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Date: Fri, 5 May 2006 14:12:47 -0700
From: [EMAIL PROTECTED]
To: [email protected]
Subject: Re: <OT> Suburban Tow Beast Help
Message-ID: <[EMAIL PROTECTED]>


Paul,
If you felt it through the seat, I would suspect a binding drive shaft.
If in the steering wheel a tire that is experiencing tread separation.

-Kevin



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Date: Sat, 6 May 2006 07:55:37 -0400
From: "Gary Derian" <[EMAIL PROTECTED]>
To: <[email protected]>, <[EMAIL PROTECTED]>
Subject: Re: <OT> Suburban Tow Beast Help
Message-ID: <[EMAIL PROTECTED]>

A driveshaft vibration has a higher frequency than a tire/wheel vibration 
and is more of a buzz than a shake.
Gary Derian

>
> Paul,
> If you felt it through the seat, I would suspect a binding drive shaft.
> If in the steering wheel a tire that is experiencing tread separation.
>
> -Kevin



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Date: Sat, 06 May 2006 10:22:01 -0400
From: KMS- Brett Anderson <[EMAIL PROTECTED]>
To: uuc Digest <[email protected]>
Subject: Re: <OT> Suburban Tow Beast Help
Message-ID: <[EMAIL PROTECTED]>



Gary Derian wrote:
> A driveshaft vibration has a higher frequency than a tire/wheel 
> vibration and is more of a buzz than a shake.
> Gary Derian
> 

Oh no it's not.....  In a BMW maybe.

My Chevy Blazer just about vibrated my fillings out when the rear 
universal on the rear drive shaft finally seized.

Now, it was a buzz for a long time prior to that, I'll give you that 
much Gary....

;-)

Brett Anderson
KMS

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Date: Fri, 5 May 2006 20:40:12 -0400
From: "Jason Kay" <[EMAIL PROTECTED]>
To: [email protected]
Subject: Re: <OT> Suburban Tow Beast Help
Message-ID: <[EMAIL PROTECTED]>

If it was tread separation, it wouldn't go away.
BTDT.

-Jason
'86 951 "Sparky"
'70 240Z "Dusty"
'97 Contour "Bambi"
'03 325xi "Daisy"



> Paul,
> If you felt it through the seat, I would suspect a binding drive shaft. If in 
> the steering wheel a tire that is experiencing tread separation.
> 
> -Kevin


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Date: Sat, 06 May 2006 11:32:53 +0000
From: [EMAIL PROTECTED]
To: "Paul Craven" <[EMAIL PROTECTED]>, <[email protected]>
Subject: Re: <OT> Suburban Tow Beast Help
Message-ID: <[EMAIL PROTECTED]>

For what it's worth, my ancient, carpet-for-floorboards, 1975 Blazer had 
similar symptoms and it was a bad steering box...junkyard replacement item of 
course. Hey I was just outta college! It also had manual steering...and a very 
large wheel ;-)

John Grills
BMWCCA-NCC
98 M3/4
91 318is project (anyone interested? 99k, will be in good shape soon...)
88 M3
87 iC

 -------------- Original message ----------------------
From: "Paul Craven" <[EMAIL PROTECTED]>
> Hi all,
>       Sorry for the off topic post, but I need some help with my 1996
> K2500 4x4 Suburban and I consider this to be the largest bodies of
> automotive intelligence I know of.  
>       Truck has just shy of 130k miles.  Whilst driving it down the
> highway to work Monday to move some stuff, it developed a shake.  It
> started slowly and built up in instensity over 20 seconds or so.  The
> shake got so bad that the coffee in my cup was shooting out of the
> little opening in the lid like a geyser. Way worse than a blowout. I
> applied the brakes to pull over and the shake got worse still. I stopped
> and got out to have a look expecting to find parts spread about or a
> square wheel or something.  Nothing appeared to be amiss.  No leaks,
> nothing loose, all the tires and hubs seemed warm, but not hot, pretty
> typical. 
>       I got back in the truck and started off slowly down the shoulder
> to turn around and try to get back home.  The shake was gone.
> Completely.  I turned around and headed for home.  About 2 miles later,
> the shake came back for 30 seconds or so and went away on its own.
> Smooth sailing the rest of the way home.
>       I inspected the truck more thoroughly when I got back in town
> last night and cannot find anything wrong.  I did some general checking
> and then spent some time looking at the front right wheel bearing since
> I had noticed some roughness and noise while "bearing" to the left on
> the highway (I crack myself up).  There is no play in the bearing or
> strange noises when turning it by hand.  Could a bearing create an
> intermittent shake? And then appear OK? These are cartridge bearings/hub
> assembly (not unlike a BMW rear hub since there is a drive axle through
> them for the 4x4).  The bearings are $250 each and not a trivial
> replacement, so I'm not real interested in doing this for fun.
>       Any other ideas? The tires are 2 years old and seem fine.  My
> plan for tonight is to put the truck in 4WD,  put it on jack stands and
> run it in place to look for noise or shakes.  Kinda scary, but I'm not
> sure what else to do.  I'd take it to a pro, but if the shake won't come
> back on command, I'll be wasting his time and mine.  Thanks for any
> ideas.
> 
> Regards,
> Paul Craven
> 1993 325ic
> 1999 528iT
> 1996 Suburban with square wheels (OBMWC - has towed the 325 home from a
> failure or two and lets it sleep through bad weather)
> 
> Search the ARCHIVES:http://www.mail-archive.com/[email protected]
> 
> 
> __________________________________________________________________________
> In memory of Michel Potheau - friend, enthusiast, founder of the BMW CCA.
> 
> UUC Motorwerks - BMW Performance Fine-tuning and home of the Ultimate
> Short Shifter - accept no substitutes!
> 908-874-9092 . http://www.uucmotorwerks.com



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