[Roadsters] Vibration

[Mark]

   First, thanks to everyone on this list that helped me sort out  this 
problem! All great advice from people with terrific knowledge of 
Roadsters!  Special thanks to those that forwarded me spare parts to try 
as well!

A stock mount (a loaner) completely cured the problem.
It was suggested that a standard trans mount - the one the urethane unit 
replaces (I used a 69 Chevelle big block mount) - may also work.  It 
takes a bit more modifying than the urethane unit, but it is very 
do-able.  The same mods to the cross member are required, so for me, 
this was essentially a bolt in operation since I had done those mods 
already.  The vibration is gone!

I am not sure if the combination of urethane motor mounts and trans 
mount caused this to be apparent in my application as I left the motor 
mounts alone, but others that have used the urethane unit have not 
reported problems, so that is a possible cause as well.   This could be 
a third option for a trans mount - and it is less than $10 at most auto 
parts stores.

Again, many thanks to all of you and I hope this helps someone else in 
the future!

Mark
-Ohio