is it safe to use shims with a lift block ?

[BL1TZKRIEG]

I have 5.5" blocks in the back "yah I know"
I will be getting a shackle flip in the future
my question is would it be save to use shims with the block?

I need to ajust my pinion angle .
I already dropped my t case and I still get a vibration.

 

[rcamacho]

1) Put the shims between the lift block and the axle, not above.
2) Make sure the nub on the block still engages the spring pad hole. If there is insufficient engagement you may need to mill/drill the nub and install a sufficiently sized bolt shank or round head bolt.
3) Alternately you could have a local machine shop mill the axle side of the block for whatever correction is necessary and tap for a bolt per 2)

 

[BL1TZKRIEG]

thanks