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post #1 of (permalink) Old 04-19-2007, 09:23 PM Thread Starter
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Drive shaft ?

Ok I have read all the basics about drive line angles. I have decided to go with the double cardan joint in the rear because with the T-case and pinion set up parallel, my angle is 24 degrees.
Now for the question. My perches are welded, so do I have to point the pinion up or will it work the way it is ?
I know the aswer is probably yes to pointing the pinion up. I was getting ready to weld on my shock mounts this weekend and don't want to do that yet if I have to rotate the axle.....
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post #2 of (permalink) Old 04-19-2007, 09:41 PM
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Yes, the pinion will have to point up. You will want the pinion a couple degrees down as opposed to pointing directly at the t-case output (especially if spring over). Click image for more info.


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Last edited by jeeperjohn; 04-19-2007 at 09:52 PM.
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post #3 of (permalink) Old 04-20-2007, 12:09 AM
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What kind of lift do you have?
If it's the stock spring lift SUA, you 'can' change the angle with wedges but that will start to effect your height...(the wedges move you axle back up).

Now...if you were going to do an SOA...then just point the pumpkin at the tail of the xfer case and weld the perches.

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post #4 of (permalink) Old 04-20-2007, 04:26 AM Thread Starter
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I new you guys were going to say that!!!! I have a spring over with 2.5 lift springs.
jeeperjohn, thanks for the link, thats where I got my info before on making the T-case and pinion parallel. I didn't realize I was going to be over 15 degrees until the other day when I was measuring for the drive shaft.
I will want to point it down slightly so it doesn't tork upward to much right? Time to grind the welds off !!!!
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post #5 of (permalink) Old 04-20-2007, 04:45 PM
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That's the idea. The angle will vary with load, acceleration, deceleration etc. I am spring over with stock YJ springs with one main leaf added. If I set mine at 0 degrees I get a vibe. At 2 or 3 down no vibes. Get a good angle finder. Makes it all a lot easier.

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