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Old February 16th, 2008, 08:40 PM   #1
ddeadserious
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Default Pinion Angle

This is for me putting my 8.8 into my XJ.

I have a SYE/CV Driveshaft.

I know the pinion should point directly at the t-case, but I've also read that it should be a certain degree up or down to account for axle wrap..

So what is it? Straight at the t-case or slightly up/down?
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Old February 16th, 2008, 08:46 PM   #2
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down 2 degrees is what I hear a lot.
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Old February 16th, 2008, 09:31 PM   #3
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Straight Would be perfect but you but it down a couple degrees to keep the ujoints in service longer.
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Old February 16th, 2008, 11:22 PM   #4
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Originally Posted by tcxtreme1000 View Post
Straight Would be perfect but you but it down a couple degrees to keep the ujoints in service longer.

i have always been told 2 degrees under pointing straight at it and the reason is not for u joint life which makes sense but that way under load the spring wrap lines it up to be straight.
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Old February 17th, 2008, 12:39 AM   #5
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Originally Posted by hosejockey4506 View Post
i have always been told 2 degrees under pointing straight at it and the reason is not for u joint life which makes sense but that way under load the spring wrap lines it up to be straight.
This is correct. The torque loads will twist the center ever so slighty within the spring. The 2 degrees down will help to cancel that out.
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Old February 17th, 2008, 09:22 AM   #6
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I've done it both ways. Can't say that I've seen a difference in u-joint life. I kinda look at it this way. If you are straight, 2 degrees above isn't going to hurt you under load if your suspension limits you to that. On the other hand highway driving is not putting enough load on your suspension to twist it. Therefore, you are running down the road 2 degrees below, which may cause slight vibrations and hurt the long term life of the joint.

I think it can be argued both ways.
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