Ed,
well after a lot of trial & error I finally got it balanced by myself.

The first thing I did was take apart the slip joint & moved the splines to 4 different spots at 90 degrees apart until I felt the least vibration. Funny but the least vibes were not in the original position but rather 90 degrees off.

Next step was to strap on a 35 gram weight to the front in 4 different spots until the vibes improved. they did at one spot but still some there.

So I strapped on a 35 gram weight at the transfer case end in 4 different spots but didnt get any joy from that. Then finally as a last resort I machined up a 50gram weight & strapped that on at one spot. Voila ! No more vibes, I couldnt believe it after all the mucking around. So I fine tuned it a bit by moving it a couple of centrimetres either way of that spot , & finally settled on one spot .


SO thats it , although I am sure that the shaft was balanced 'on the lathe' once it was fitted it vibrated , so now I have 2 hose clamps on both ends with weights under them.

I now need to make up new weights with the weight of the clamp screw added which was 14 grams. & then weld them on.

I cant believe I fluked this finally. I guess there are some inbalances in either the transfer case or front diff ,but I finally got it!