On Thu, 24 Mar 2005 10:32:36 -0800, "Mark C."
>Can I safely have the stock two piece drive shaft in my '71 F-100 longbed
>converted to a single shaft?
Before you do that, you should do a bit of research. One of
the factors that determines the maximum RPM of a drive shaft
is the length. That is because the longer the shaft is, the
more critical balance becomes and the more likely it is that
the shaft will "whip" as the RPM increases. This also
influences the torque rating of the shaft and reduces the
critical RPM of the shaft. You can find one calculator for
critical speed here:
The two section design also safely allows for greater
overall driveline or U joint angles which help reduce joint