2 piece driveshaft angle question.

[Full Floater]

I am in the process of converting a tandem R600 into a single axle for a re-purpose of the truck.

The overall length of the driveshaft has extended by a little over 2ft.  I had the driveshaft professionally lengthened and balanced.  All new u-joints and steady bearing.  The location of the steady bearing is further back and I am moving a crossmember to accommodate the bracket.   AND I have to use or make another steady bearing bracket as I didn't get the bracket back with the driveshaft and the driveline shop is 5hrs drive away.

Can someone school me on driveshaft angles a bit?  It's my understanding that the angle of all the joints should be 3 degrees or less....  what else am I missing here?  

Edited June 10, 2023 by Full Floater

[Joey Mack]

3 degrees..  You may be able to find a shim plate for the center bearing mount that will be a 3 degree shim.  I will be in my shop in a couple hours. I will look in my drive shaft book for info.  Jojo

[Joey Mack]

Ok,, I have this book.  Here is what I think you are asking for..  Text me if you cant read it clearly or for whatever reason.  704-785-1738

[mechohaulic]

memories of days gone by.  "we have the technology, we can rebuild it". 

[Full Floater]

2 hours ago, Joey Mack said:

Ok,, I have this book.  Here is what I think you are asking for..  Text me if you cant read it clearly or for whatever reason.  704-785-1738

A reply that exceeded all expectations, again!

 

THANKS

[Freightrain]

When I stretched my truck and added the aux transmission, I had to play around with things to get the angles to all balance out.  I think motor was like 4* down, so I had to hang the aux box tilted 4* down to match(but on the same height as motor) and then the rear was close enough.  Each end of the shaft has to equal 0* to make the joints work smoothly.  Mine has no noticeable shake, besides being a 60 yr old truck!

[mrsmackpaul]

5 hours ago, Freightrain said:

Each end of the shaft has to equal 0* to make the joints work smoothly. 

Correct

And if you were to draw a line end to end the yokes on each shaft should line up, but between the shafts they should be slightly different 

As a general rule of thumb, it might be only my thumb though, each shaft should be one notch on the spline anti clockwise working from the front to the rear 

This is called phase angle

Dunno how or why this makes a difference but experience tells me it does 

 

Paul

[Joey Mack]

It makes for a smooth rotation in the joint. If ujoints are straight on,,  the bearings won't rotate, and that will cause Brinelling...

[doubleclutchinweasel]

There is a lot of good information out there on the interweb about proper phasing of yokes and about different ways to handle shaft angles.  Like Jo-Jo said, straight in line is not a good thing.  Equal angles on each end of a shaft are generally considered a good thing.  I have also seen "equal and opposite" angles on each end of a shaft work.

Plenty of good info out there about this.  I'm sure it will all work out.