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

allevolution · Feb 2, 2014

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

VAhasnoWAVES · Feb 2, 2014

it needs to be inline... so telling you exactly what degree isnt possible until you install everything.

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

allevolution · Feb 2, 2014

No offense I have seen that picture alot,
And thats not inline from what I see.

How can I determine a starting point?

VAhasnoWAVES · Feb 2, 2014

allevolution said:
No offense I have seen that picture alot,
And thats not inline from what I see.

How can I determine a starting point?

ummm... looks to me that the Ujoint at the pinion is not misaligned. but ok.

install your parts. measure. shim.

allevolution · Feb 2, 2014

VAhasnoWAVES said:
ummm... looks to me that the Ujoint at the pinion is not misaligned. but ok.

install your parts. measure. shim.

Oh alright, I thought you meant align as in the diff was parallel to the output of the tcase.
Will do thank you

AIbandit · Feb 2, 2014

VAhasnoWAVES said:
it needs to be inline... so telling you exactly what degree isnt possible until you install everything.

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.

allevolution · Feb 2, 2014

AIbandit said:
High angle driveline told me 2* down.

Diff should be 2* down from the tcase measurement?

Cburb88XJ · Feb 2, 2014

I believe its because the axles will rock back slightly under acceleration

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

allevolution

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VAhasnoWAVES

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allevolution

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VAhasnoWAVES

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allevolution

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allevolution

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Cburb88XJ

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