2000 XJ
2" spring lift and AAL
Minimal vibrations 30-40mph.

TC output is at 2.5º - driveshaft angle is 14.5º and diff is at 5.5º

So if I use a 2º shim, that would by my rear diff at 3.5º (I guess should this be 2.5, the same as my TC angle?)

Would this put my driveshaft at 16.5º?

Do some searching but with those types of drive shaft, both the axle side and transfer case side should be the same angle

The relationship between the driveshaft and output on the diff is the biggest thing (this changes somewhat when going over 4" of lift). Usually should be 1 degree higher to accomodate for acceleration and load but not always

+1

Not sure what "driveshaft angle" is but the yokes should be near parallel, or at least the same angle.

The working angle at the TC/DS is 12º and at the DS/Pin is 9º

If I understand correctly, those should be equal or less than 1º apart to compensate for axle wrap.

My only concern is that the driveshaft is already at 14.5º which is too steep, shimming with that will only increase that angle even steeper. Still, I'm going to try 2º shims to see what happens.

I'm stuck with either doing a TC drop and an SYE as is usually the case. Guess I'm jumping into the SYE.

sorry... drive shaft "slope"
http://www.4xshaft.com/tech_slopesVSangles.asp



I'm looking for the link, but I read factory spec should be 7º or less (which is conservative) but the aftermarket suggest 14º or less with a factory NON CV driveshaft. I'm already past that so my attempt to avoid a TC drop or SYE is futile.