What should my rear pinon angle be? (lots of info)

allevolution

NAXJA Forum User
Location
Chicagoland
2000 XJ, NP231
Almost exactly 4" lift all around
Currently swapping my d35 for a 825 I got.

I am using:
-IRO hack n tap
-OEM front shaft
-RC lift Shackle brackets (1.5")

What (in degrees) should my rear pinion be?
I have various axle shims and I need an idea where I need to point my pinion
 
it needs to be inline... so telling you exactly what degree isnt possible until you install everything.
Double_Cardan_driveshaft.gif


having it point slightly down isnt a bad idea either, as itll account for pinion change during acceleration.
 
it needs to be inline... so telling you exactly what degree isnt possible until you install everything.
Double_Cardan_driveshaft.gif


having it point slightly down isnt a bad idea either, as itll account for pinion change during acceleration.

High angle driveline told me 2* down.
 
I believe its because the axles will rock back slightly under acceleration
 
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