Checking Driveling Vibration & Calculating It.

[Port&PolishMan]

First Off
RPM and Drive-line Vibrations - Looking at the Gearing and Engine RPM's

Seeking to Figure - Drive Line - RPM to see If the Drive Shaft may be
an Issue as it is Past it's Design .. Limit ..

I see where a few stated 45 - 48 Mph & 1 or 2 say Run up to 55 Mph
Pumpkin Gear 5:14

1954 4 Speed - with PTO - Type of Transmission .

V8 Spinning 4000 RPM with 5:14's in Third Gear or 4th Gear
Approx what RPM is Drive-Shaft Spinning ?