Leaf spring shims

Are leaf spring angle shims to get your differential in line with the drive shaft or is it to get the drive shaft in line with the carrier bearing?

I just installed some Dekars and the drive shaft and rear end are in line perfect. The drive shaft does an angle sum with the carrier bearing. Thanks would have done a search but my phone won't search on this site

 

Diff to drive line.

To correct the carrier you drop it down a bit with spacers.

 

Axle shims are for correcting/aligning the relative angle from the yoke/flange off the rear diff to the drive shaft's rear U joint (where it bolts together) As mentioned, if vibes occur in the carrier bearing, alignment is usually done with a CB drop kit or spacers (they both achieve the same thing)