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Noise after lift- help

Old 03-04-2016, 09:32 PM
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Default Noise after lift- help

After lifting my XJ about 4 inches I now get a noise that sounds like a kid put a playing card in the spokes of his bicycle when I'm braking. It's coming from the rear. Wondering if it's the differential rotating slightly down when I brake and binding the U-joint??? Any thoughts?
I have a T-case drop on order, but that won't change the angle of the pinion. Take a look at the picture and tell me what you think of the angle? Do I need shims too, or is this something completely different?
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Old 03-04-2016, 09:50 PM
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I would simply start with the t case drop and go from there. Make sure that your u bolts are nice and tight.
Old 03-04-2016, 10:22 PM
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That joint is at too steep of an angle.
ETA (not my pic):

Last edited by Turbo X_J; 03-04-2016 at 10:25 PM.
Old 03-04-2016, 10:22 PM
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I would measure the angles and find out how off you are. Anything over 3" as a general rule of thumb, should be a SYE and possibly shims. But the only way to truly know, is to measure your angles on the pinion and TC output shaft, optimum angles should be within 1-3* of each other, without a SYE. A TC drop is a bandaid fix anyways, to get you by until you can set it up properly. TC drops put added stress on motor and trans mounts. Double cardan joint is the way to go.
Old 03-04-2016, 10:23 PM
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Originally Posted by Turbo X_J
That joint is at too steep of an angle.
Agreed.
Old 03-05-2016, 08:58 PM
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I ordered 4 degree shims and a 1" T-case drop. I can't aford a SYE right now. Hopefully it will fix the issue. Is anyone else running this setup?
Old 03-05-2016, 10:05 PM
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Originally Posted by Joe Dirt
I ordered 4 degree shims and a 1" T-case drop. I can't aford a SYE right now. Hopefully it will fix the issue. Is anyone else running this setup?
Did you measure the angles? Reason I ask, is you need the CORRECT degree shims...you could put those on, and be in the same boat. You need to do some noggin' pokin' and find out EXACTLY how off you are...you may be able to get by with just a TC drop...or with the proper shims, and no drop, or a combination of both, but you need to know what you're working with before you start throwing money at it...still recommend a SYE...yes it costs more, but do it right, and stop tossing money into a hole, just sayin'....
Old 03-06-2016, 06:42 AM
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Originally Posted by roninofako
Did you measure the angles? Reason I ask, is you need the CORRECT degree shims...you could put those on, and be in the same boat. You need to do some noggin' pokin' and find out EXACTLY how off you are...you may be able to get by with just a TC drop...or with the proper shims, and no drop, or a combination of both, but you need to know what you're working with before you start throwing money at it...still recommend a SYE...yes it costs more, but do it right, and stop tossing money into a hole, just sayin'....
http://www.harborfreight.com/angle-finder-94963.html
Old 03-10-2016, 01:29 PM
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"NOGGIN POKIN"...

Sorry, That's just funny...
E
Old 03-10-2016, 01:30 PM
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Originally Posted by rockosocko
"NOGGIN POKIN"...

Sorry, That's just funny...
E
Don't be sorry. It IS funny. Google "noggin pokin".
Old 03-10-2016, 06:49 PM
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Originally Posted by Turbo X_J
That joint is at too steep of an angle.
ETA (not my pic):
The angles in that pic are COMPLETELY wrong.

Single cardan shafts MUST be parallel.


That set up is for a double cardan shaft


http://www.billavista.com/Tech/Artic...ble/index.html
Old 03-10-2016, 06:50 PM
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Originally Posted by Joe Dirt
After lifting my XJ about 4 inches I now get a noise that sounds like a kid put a playing card in the spokes of his bicycle when I'm braking. It's coming from the rear. Wondering if it's the differential rotating slightly down when I brake and binding the U-joint??? Any thoughts?
I have a T-case drop on order, but that won't change the angle of the pinion. Take a look at the picture and tell me what you think of the angle? Do I need shims too, or is this something completely different?

New ujoints.
Old 03-10-2016, 07:29 PM
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Originally Posted by Jeep Driver
The angles in that pic are COMPLETELY wrong.

Single cardan shafts MUST be parallel.


That set up is for a double cardan shaft


http://www.billavista.com/Tech/Artic...ble/index.html
Here slow this time:
Ahhhhhhh....I said it waaaaaassss wrrrrrrrooooonnnnggggg.......
I certainly hope you are not driving...
Old 03-12-2016, 08:54 AM
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Originally Posted by Jeep Driver
The angles in that pic are COMPLETELY wrong.

Single cardan shafts MUST be parallel.


That set up is for a double cardan shaft


http://www.billavista.com/Tech/Artic...ble/index.html
If I read the info in the link correctly, with a SYE and "CV" driveshaft installed, the pinion should be inline with the driveshaft. Correct?
Old 03-12-2016, 09:04 PM
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Originally Posted by ElMartillo
If I read the info in the link correctly, with a SYE and "CV" driveshaft installed, the pinion should be inline with the driveshaft. Correct?
That is correct, but in that photo you don't have a CV shaft.
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