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Brian,
Excellent idea. I
just saw that very suggestion in the Chevelles.net archive. I had never thought
of it before. Do you know how to set the angle? Is it something you just
"eyeball" or is there a methodology for setting it
correctly?
This is an
important one because the entire vehicle was removed from the chassis and the
rear end removed for restoration. It may have gone back in slightly off the
correct angle. And the fact is, I have no idea how to check
it.
Craig
Have
you checked the pinion and driveshaft angles so that the pinion to driveshaft
and tranny to driveshaft angles are equal? Were the rear control arm bushing
bolts tightened with the suspension loaded to maybe have an effect on this
angle and/or possible traction problems. Just some thoughts. I would
definately check the driveshaft angles though, Good luck.
Brian
Zack
'70
Chevelle Malibu
mailto:brianz@dpsabq.com
-----Original
Message-----
From: Craig A. Ellis
[mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 31, 2002 8:43
AM
To: Chevelle (E-mail)
Subject: [Chevelle-List] Help:
Rear end and driveshaft vibration problem
Hello again, fellow Chevelle owners. I
had to unsub for a while due to vacation and some seriously pressing
business, etc. Anyway, I've been vexed with a serious driveline vibration
this summer that is defying all of my attempts to fix. It begins in fourth
gear around 2600 RPM and increases in intensity up to 3200 where it smooths
out because the frequency is so high by then that it is not so annoying. My
speedo is out at the moment so I don't know the MPH but the vibration does
NOT change if I downship to third. Thus, I believe it is driveshaft and
rear-end related. It is vehicle speed related, not engine
speed.
I've installed a brand new
stainless steel driveshaft (from CCI in Detroit) and ujoints, double checked
it for runout (it's perfect), installed a new pinion flange (again, from
CCI), and I already had a new ring & pinion and new Moser axles. The
trans has been rebuilt and seems perfect. The motor seems well-balanced and
the front end components are tight (it does not feel anything like a
front-end problem anyway - it's not a shimmy, etc., it is a vibration you
feel in the seat of your pants as well as the steering wheel). I even have
new Edelbrock wheels (409's in 17x8) and BF Goodrich g/Force KDW's, but
there was no change in the vibration from my old stock SS wheels and
old-fashioned meats. BTW, you can see a pic of the car (unfortunately, with
the old SS wheels) at www.neagroup.com/chevelle.htm.
Everything I've tried seems to have
improved the problem in steps. The most recent trick is I flipped the
driveshaft and it got a wee bit better but still no joy. The pinion flange
made a big difference, as did the driveshaft. But it is still not smooth
enough to cruise the expressway at 65 without aggravation and
worry.
I am open to any ideas any of you might
have. I am at a loss as to what to do next.
Craig Ellis
Port Huron,
MI
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