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More Shaking Cars

To: "MG List" <>
Subject: More Shaking Cars
From: "Jason Dutt" <>
Date: Thu, 15 Apr 1999 13:26:59 -0400
Hello, denziens of the list.  Recently we saw a thread regarding a car with
the shakes.  My symptoms are a bit different, so I thought I'd seek further

Before I get in to the problem, let me create a scenario.  The front and
rear suspension on my 72 MGB have been completely rebuilt using a SPAX
conversion on both ends.  I have new Minilite Repro wheels with new tires
that have been recently balanced on the dyno thingy the tire place uses.
When the following symptoms first came up, I took the car back to the
specialist who did all the aforementioned work.  After checking for any
goof-ups, and finding none, he suspected the drive shaft.  Indeed, the
bushings in the universal joint were shot, so he replaced them.  This
improved the situation, but the symptoms do still persist.

So, with all that said, here's what's up.  At about 60-65 MPH, and
intermittent shake will appear, usually in the steering wheel.  This shake
will get worse as I accelerate, up to 75-80 MPH.  Past 80 MPH, the shake all
but disappears, but I'm guessing it's just because the harmonics are just so
fast that I can't distinguish them anymore.  Here's the weird part:  The
shake will move from the front to the rear of the car, then back again.  In
other words, it's not always in the front, or always in the back.  It
migrates.  Sometimes, it doesn't shake at all.

If you need any further info, please let me know, but I think this is all
that's pertinent.

Thanks in advance,


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