[alfa] driveshaft vibration

[Gil Gagne <gilgagne@xxxxxxxxxxxxx>]

I can definitely sympathize with Ed Prytherch's driveshaft vibration 
problem. My 1985 Spider has a driveshaft resonance at about 38 mph which 
goes away +/- 6 mph. I've had the u-joints replaced and the complete 
shaft balanced at the drive line shop to no discernible effect. Since 
the engine had dropped to the point of just touching the engine guard, I 
replaced the motor mounts and this raised the engine about 1 inch, 
eliminating a bend at the drive line doughnut. Still no vibration 
improvement. Had all wheels balanced again. Same result. I then replaced 
the front section shaft with a spare that has a new bearing. Still same 
vibration. At this point it appears that the only remaining option is a 
complete new drive shaft, but at $319 plus shipping (IAP), I'm looking 
for a second opinion; any volunteers?

Gil
Port Orange, FL
1985 Spider
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