Another Drive Shaft Length Question

["Dart67"]

I have moved the rear end back 1" for more tire clearance.

Now I have a question on the Drive Shaft Length.

Here is what I have.

The Drive Shaft measures 48" center to center of U joints.

With the Slip Yoke pushed all the way forward and bottomed out on the 727 transmission output shaft, the center to center measures 49 1/2".

This gives 1 1/2" of travel. Is this too much?

The Slip Yoke has 4" of internal splines from the U joint end.

This would leave 2 1/2" of splines on the output shaft.

Should I have another drive shaft made with 48 1/2" center to center?

Herb

 

[Bad Sport]

You didn't mention whether you took those measurements with the suspension loaded or unloaded.

 

["Dart67"]

You didn't mention whether you took those measurements with the suspension loaded or unloaded.

Sorry, I took all the measurements loaded. all four wheels on the ground. (4 post lift)

Herb

 

[Bad Sport]

IMO, 2 1/2 should be plenty. I think that's about where I'm at on mine.

 

[spl440]

Should be plenty, but he has sticky tires and over 500 ft torque at the rear wheel. Also would there be a vibration issue with that much of the slip yoke sticking out?