Looking for differential pictures as reference from members please.

Ya from what I read, vibes are usually from the transfer case angle not the pinion.

 

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Not good in a long time and also vibe is bead for welds, fittings, etc.
Have ordered 2* shims from 4Crawler 3 weeks ago and still no date when shipped...under fabrication.
This is why I am not using the truck as much as possible not to over load the u-joints and shake the truck.

 

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Axle wrap is a product of motion. Newton's laws in real life. As one mass is moving in a direction, the other mass is moving in the opposite direction as:
- airplane propeller is spinning to the right and the plane is banking left.
- front wheels spin down and the car nose rises.
Another reason to start slow from still and accelerate progressively to minimize axle wrap...3.5L is slow but a gift in disguise.

 

@Dacon have you seen this? http://spicerparts.com/calculators/driveline-operating-angle-calculator

 

Yes I have that calculator but I lost the paper with data we did...

 

Ahhhhh but I took a pic of it. But it'll cost you those front Fox takeoffs

 

FOX gone a long time ago...Love the Icons stiffness.

 

I have average all values from the 3 point measurement and I have:
first U-joint from transfer case to haft 1 working angle 3.2* (have zeroed on the transfer case and also flange to make sure is 0*)
- shaft one 3.2*
- shaft two 7.7*
middle U-Joint working angle 4.5*
- shaft two 7.7*
- pinion angle 0.5*
pinion working angle 7.2*
7.2 - 4.5 = 2.7*
Need shims of 2.7* (2* or 3*)
Here comes another question. Since by adding a shim will rise (add) another 1/4" to the rear height of the truck and also increase the second shaft to pinion U-joint angle, do I use the 3* shims I have or wait for the never showing 2* shims I ordered? Also in time if the rear leaf springs sag, would the 3* induce a too much angle to the U-joint pinion?
(data collected with another TW member. Yellow is my data)

 

Your first working angle is 3.2*?

 

For reference, the blue is my stock DCLB

 

Yes first angle is 3.2* Considering I have never work on the engine/transmission/transfer case and also never touched the CB to influence the angle of the U-joint at the transfer case and the first shaft, I guess it came like this form truck mama. Curious what others have the angle there.

 

Leveled ground in the middle of the Cul-de-sac (hope so) and used HF angle finder. Before the truck measurement I have checked a few well known angles in the shop and was accurate within 0.0* and 0.1*.