[alfa] driveshaft balance

["Ed & Marsha Prytherch" <mred2u@xxxxxxxxxxxxxx>]

AR specify that the driveshaft should be balanced at 5000 rpm. I had one
done at a truck place by a guy that owns a Fiat spider, so I thought that it
was in good hands. He retubed it and balanced it for $100. I asked him how
was the balance and he said "pretty good" . There were no balance weights
attached to the new tube. On the car it started to vibrate at about 3000 rpm
and got progressively worse as it went faster. I strongly suspect that it
was balanced at an rpm a lot less than 5000 and I wonder how many truck
places can balance at that speed. I will do more research on the
capabilities of the next balance shop that I use or I will try to do it
myself by the chalk and hose clip method.
Ed Prytherch, Columbia SC
73 GTV
79 Spider

John wrote>
I researched into this,  since I was wondering about mine as well..
though it probably is OK and some of what I hear is likely the
beginnings of transmission bearings.  What I found out was,  calling
your local RV or Trucking center is a good way to either find them as a
source of driveshaft balancing,  or the local specialist they use.  The
guy here would balance a small (car size) two piece driveshaft for
$50-60 or so.
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