Is it crucial that the tailshaft be mounted perfectly in line with rearend pumkin when talking side to side or I am assuming it makes little difference as I believe I have seen some vehicles that did not follow any such rule.

 

From side to side no. But in level it needs to be within 6 degrees.

 

Can you explain a little more what you mean in level, a little more detail I mean so i am clear, assuming you mean that you cant have to much of a rake on driveshaft like you see alot of jacked up trucks with causing a bind or just asking for worn out u-joints. Is that what you mean?

 

I've been boning up on all this stuff. My truck is going to have a divorced transfer case with 4x4, so I've got two drivetrain members, two axles, and three driveshafts to mount and phase. It's going to be interesting to say the least. Have a look at John Niolon's great driveline phasing article and cypher on it for awhile. It's clear and well written and should answer all your questions. It can be found here:

http://jniolon.clubfte.com/driveline...nephasing.html

Also remember that you've got to consider total driveline angle when making your calculations. That means figuring your side-to-side offset and adding it to your vertical offset to get the total. If you want a little heavier reading, check this Dana document out:

http://www2.dana.com/pdf/J3311-1-HVTSS.PDF

And if you're still interested after all that, here's one more:

Pirate4x4.Com - Extreme Four Wheel Drive

 

BOR that's EXCELLANT!

Saved to Favorites!

 

The link to John's phasing article is all anyone should need to know. Very well done.

 

Thanks Blue Oval, I appreciate the time you spent on this and even more your sharing it.